PRODUCT  CATALOG

CAT. No.129E

SURGE  ABSORBERS

SENSORS  AND  MODULES

THERMISTORS

3

THERMISTOR

POWER  THERMISTOR

VRD   

(TRANSIENT  VOLTAGE  SUPPRESSOR)

CRD  

(CURRENT  REGULATIVE  DIODE)

ZENAMIC  

(METAL  OXIDE  VARISTOR)

GAS  TUBE  ARRESTER

6

21

26

30

32

40

HIGH  PRECISION  SERIES

SMD  SERIES

HIGH  HEAT-RESISTANCE  SERIES

DISK  SERIES

SENSORS

NON-CONTACT  SENSOR

4

THERMOPILE

NC  SENSOR

D-TYPE  SERIES

MARK       SERIES

 

D2-TYPE  SERIES

SMD  SERIES

LEAD  TYPE  SERIES

LEAD  TYPE  SERIES

MELF  TYPE  SERIES

LEAD  TYPE  SERIES

M  TYPE  SERIES

SURGE  ABSORBER  UNIT  SERIES

CERAMIC  TUBE  SERIES

GLASS  TUBE  SERIES

SA-01  SERIES

4

THERMOPILE

Dimensions

Ratings

Part number

Thermopile type Infrared sensor

utilizing own silicon micromachining

technology.

Applications:Eardrum thermometer

Microwave oven

Non contact temparature measurement

Part No.

15TP551T

15TP551N

10TP581T

type

TO5

TO18

Thermistor

Built-in

Built-in

8.2

0.05

3

4.5

3

0.8

0.1

1.8 max

45

0.8

A

   1.56

0.01

9.4 max

2

2

1

1

4

4

3

3

3.8

0.05

0.45

0.03

10.3 max

A

TO5

4.65

0.05

(3.12)

(2.4)

0.7

A

   1.05

0.01

5.6 max

2.4

A

TO18

0.1

0.4

0.45

0.05

0.03

3.2

0.3

0.1

6.6 max

(TOP VIEW)

(SIDE VIEW)

(BOTTOM VIEW)

5.08

0.2

1

0.2

1.35

0.2

2.2

0.1

13.2

0.5

Au plated

SENSOR

SURFACE

FILTER

SURFACE

R 0.3 max

R 0.5 max

OPTICAL

DISTANCE

2.54

0.2

13.2

0.5

2.95

0.2

1.25

0.2

0.55

0.2

SENSOR

SURFACE

FILTER

SURFACE

R 0.3 max

OPTICAL

DISTANCE

1

5

5

1 T

0 0

1

1

Parameters

Unit

Conditions

Value

15TP551

10TP581

Sensitive area

*

1

 Responsivily

*

1

 Output Voltage

*

2

 Output Voltage

*

1

 Temperature Coefficient

of Responsivily

Thermopile Resistans

Temperature Coefficient

of Thermopile Resistance

Johnson Noise Voltage

*

1

 S/N Ratio

*

1

 Noise Equivalent Power

*

1

 Specific Detecivity

Time Constant

Operating Temperature range

Strage Temperature renge

Filter Range

Field of View

Insulation Rasistance

Sealing

*

3

 Thermistor Resistance Value

*

3

 Thermistor B-Value

*

3

 Thermistor Rated Power

Test Condition

Blackbody Temperature

Sensor-Blackbody Distance

Sensor Temperature

Aperture size

: 500K

: 100mm

: 298K

: 

12.7mm

*1

Test Condition

Blackbody Temperature

Sensor Temperature

: 310K

: 298K

*2

Built-in Type

*3

1.56

1.56

16

30%

490

30%

2.49

30%

0.01

0.02

55

30%

0.1

30

84.2

1.9

8.4

10

7

45

20

100

40

100

Cut on 5

45

    500

    1

10

9

100

3%

3435

0.7%

0.5

1.05

1.05

15

30%

200

30%

1.00

30%

0.02

0.02

65

30%

0.1

33

75.7

2.2

4.7

10

7

15

20

100

40

100

Cut on 5

50

    500

    1

10

9

100

3%

3435

0.7%

0.5

mm

2

V/ W

V

mV

% / 

C

k

 

% / 

C

nV/ 

dB

nW/ Hz

1/2

cm

•

Hz

1/2

/ w

ms

C

C

m

deg.

M

 

Pa

•

m

3

/ s

k

 

K

mW

Size of Absorbing Film

Reference

Johnson Noise r.m.s.,298K 1Hz Typical

Output Voltage/Johnson Noise, Typical

Typical

Typical

Typical

Standard

Incident Angle to Ahieve 50% Responsivity

Application of DC25V

Rated zero-power resistance Value at 25

C

at 25

C

Hz

Unit  mm

THERMOPILE TYPE INFRARED SENSOR

5

NC SENSOR

NC SENSOR is the remote temperature sensor

consisting of two precision thermistors.

1.Features

3. Dimensions

4.Specification

Parameters

F-type (for heat-roller)

M-type (for microwave ovens)

Performance

180

C

3

C

Conditions

Temperature 

Accuracy

Blackbody Temperature : 180

C

Thermal Emissivity : 0.96

Temperature compensation : 100

C

Roller Size : 40mm

Testing Distance : 5mm 

Resistor Connected : 33.0

 

Power Line Voltage : DC 5.000V

Operating 

Temperature 

Range

Temperature 

Detecting 

range

 • 

Larger output in comparison with other IR sensors.

 • 

Operating temperature of up 150

C.

 • 

Minimum negative influence caused by a dew and/or

   dust.

2.Applications

 • 

Temperature measurment of the LBP and PPC heat-

   roller.

 • 

White goods such as microwave-ovens, air-conditioner,

   refrigerator and so on.

 • 

Any other measurement requiring the remote-sensing.

52.5

28

5

2

28

8

23

18

12

5

1

4

1

4.6

38

29.2

21.2

6

5.5

34.5

5

200 (120

300)

160 (120

300)

3

10

12.6

3.2

5.6

8

F-type

M-type

Unit  mm

Unit  mm

Performance

Conditions

Blackbody Temperature : 60

C

Thermal Emissivity : 0.995

Temperature compensation : 25

C

Resistor Connected : 68.0

 

Power Line Voltage : DC 5.000V

60

C

5

C

10

C

150

C

10

C

260

C

10

C

100

C

NON-CONTACT SENSOR (Infrared sensing temperature detector)

6

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

3.0

3.1

3.2

3.3

3.4

3.5

3.6

3.7

3.8

3.9

B:3350

B:3400

B:3650

1k

10k

100k

Resistance(

 

)

Temperature(1/ Tx10

3

)

THERMISTOR

"Thermistor" is the generic name given to

thermally sensitive resistors.

Negative temperature coefficient thermistor

is generally called as thermistor. Thermistor

is a semiconducting ceramic resistor

produced by sintering the materials at high

temperature and made mainly from metal 

oxide. 

Depending on the manufacturing method

and the structure, there are many shapes

and characteristics for various purposes

such as temperature measurement, 

temperature compensation and etc.

The thermistor resistance values, unless

otherwise specified, are classified at a

standard temperature of 25

C.

B constant is calculated from the resistance 

values at 25

C and 85

C.

The resistance of a temperature is solely a function

of its absolute temperature. Since electrical power

being dissipated within a temperature might heat

above its ambient temperature and thereby reduce

its resistance,  it is necessary to test for resistance

with temperature. The resistance so measured is

called RT, which means the resistance at essentially

zero-power.

The mathematical  expression which relates the

resistance and the absolute temperature of

a thermistor is as follows:

R

a

R

b

 exp

  

B  1

T

1

1

T

2

B

T

2

R

a

T

1

Where:

is the resistance at absolute temperature

is the resistance at absolute temperature

R

b

T

2

B is a constant which depends on the

material of the thermistor

Unless otherwise specified,all values of B are

determined from measurements made at 25

C and

85

C.

The temperature coefficient of resistance

 is expressed in the follow ing equation: 

100 (%/ 

C)

Resistance -Temperature Characteristics

Dissipation factor

Thermal time constant

Dissipation factor (

) is power in milliwatts

required to raise thermistor temperature 1

C.

Measured with thermistor suspended by its leads in

a specified environment.

 

t:Raise temperature(

C) 

t

P

(mW/ 

C)

P :Power(mW)

Thermal time constant (

a

) is the time required by a

thermistor to change 63% of the difference between

its initial and final temperature. Measured with

thermistor suspended by its leads in specified

environment.

95

87

63

a

2

a

3

a

5

a

Time (s)

(%)

7

JT  THERMISTOR

JT thermistors feature ultra thinness of 500

m and 

superior electrical insulation.

It is possible to use with safety in ambience that

might contact with electrodes.

Part number

103 JT- 025

Shape

Rated zero-power resistance 

at 25

C  103 

:

 10k

 

JT the rmistor

Dimensions

A

3.6

0.5

5

1

2.0

0.5

0.5

0.035

0.17

0.02

1.8

0.1

Unit(mm)

0.5max.

Adhesive

lnsulation film

lnsulation film

Tin plated wires

42 Alloy leads

Slipped film 

:

 1 max.

Protruded adhesive 

:

 1 max.

Shape

Dimensions A

025

25

1

50

1

75

1

100

1

050

075

100

Specifications

Type

Resistance-Temperature

Temperature

(

C)

Unit(k

 

)

50

40

30

20

10

0

10

20

30

40

50

60

70

80

90

100

110

120

125

367.7

204.7

118.5

71.02

43.67

27.70

18.07

12.11

8.301

5.811

4.147

3.011

2.224

1.668

1.267

103JT

104JT

Part No.

R

25

*

1

B value

*

2

Dissipation  factor

(mW/ 

C)

Thermal  time 

constant(s)

*

3

Operating  temp.

range(

C)

Rated power

at 25

C(mW)

103JT-

104JT-

10k

 

1%

100k

 

1%

3435K

1%

4390K

1%

0.7

0.7

5

5

3.5

3.5

50

90

50

125

9584

4572

2282

1191

647.2

365.0

212.5

127.7

78.88

50.03

32.51

21.61

14.66

10.13

7.135

5.111

3.720

2.746

2.371

*

1

   R

25

 : Rated  zero-power  resistance  value  at  25

C,  

2%  and  3%  are  also  available.  

*

2

   B  value : determined  by  rated  zero-power  resistance  at  25

C  and  85

C.

*

3

   Time  when  thermistor  temperature  reaches  63.2%  of  the  temperature  difference.  The  value  is  measured  in  the  air.

ULTIMATE THINNESS, JT THERMISTOR

500

m only

8

1.0

Tiebar cut

4.0 max.

2.54

0.25

8.5

1

17

1.5

Color code

Epoxy

0.5  Tin-Plated

42 Alloy

2.4 max.

2.4 max.

3.8 max.

15 max.

Marking

0.3sq 

TPE lead wire

4.0 max.

5 max.

2.54

0.25

5

1

8.5

1

6

0.2

17

1.5

0.7

Tiebar cut

3.8 max.

Epoxy

Color code

0.5  Tin-Plated

42 Alloy

Soldered

600

20

0

AT-2

AT-11

AT-2SS

AT-2S

AT-3

AT THERMISTOR

The AT thermistor is a high-precision thermal 

sensing device featuring extremely small 

B-value tolerance and resistance.

When used as a temperature gauge, the AT 

thermistor requires no adjustment between 

the control circuit and the sensor.  

This insures temperature precision of 

0.3

C.

Temperature indicators and control instruments 

are now available for use with the thermistor.

 

102 AT- 2

Shape

High-precision AT thermistor

Rated zero-power

Resistance at 25

C 102 : 1  k

Dimensions

Interchange precision

Part  number

Specifications

Temperature

precision  

C

2.5

2.0

1.5

1.0

0.5

0.5

C

0.7

C

1

C

102AT-2

202AT-2

502AT-2

103AT-2

203AT-2

503AT-2

104AT-2

103AT-3

102AT-11

202AT-11

502AT-11

103AT-11

1.0k

 

1%

2.0k

 

1%

5.0k

 

1%

10.0k

 

1%

20.0k

 

1%

50.0k

 

3%

100.0k

 

1%

10.0k

 

1%

1.0k

 

1%

2.0k

 

1%

5.0k

 

1%

10.0k

 

1%

3100K

1%

3182K

1%

3324K

1%

3435K

1%

4013K

1%

4060K

1%

4665K

1%

3435K

1%

3100K

1%

3182K

1%

3324K

1%

3435K

1%

2

2

2

2

2

2

2

2

3

3

3

3

15

15

15

15

15

15

15

15

75

75

75

75

10

10

10

10

10

10

10

10

15

15

15

15

50

90

50

90

50

110

50

110

50

110

50

110

50

110

50

110

50

90

50

90

50

105

50

105

Black

Red

Yellow

White

None  

None  

None

White

None  

None  

None  

None  

103AT-2S

103AT-2SS

103AT-4

Shape1

10.0k

 

1%

10.0k

 

1%

3435K

1%

3435K

1%

1

1

15

15

5

5

50

110

50

110

white

white

10.0k

 

1%

10.0k

 

1%

3435K

1%

3435K

1%

2

4

10

35

10

20

30

90

30

90

None

None

Part No

R

25

*1

B value

*2

Dissipation  factor

(mW/ 

C)

Thermal  time 

constant (s)

*3

Operating  temp.

range(

C)

Color  code

Rated power

at 25

C (mW)

*1   R

25

 : Rated  zero-power  resistance  value  at  25

C.

*2   B  value : determined  by  rated  zero-power  resistance  at  25

C  and  85

C.

*3   Time  when  thermistor  temperature  reaches  63.2%  of  the  temperature  difference.  The  value  is  measured  in  the  air.

103AT-4

Shape2

Resistance tolerance

40

30

20

10

0

10 20 30 40 50 60 70 80 90 100

Resistance

tolerance  

5

4

3

2

1

Ambient temperature    

C

40

30

20

10

0

10 20 30 40 50 60 70 80 90 100

Ambient temperature    

C

Unit  mm

8max.

13max.

Epoxy

3

2.5max.

4max.

UL1685 AWG30

40

100

AT-4

Shape1

Shape2

30

5

100

225

Epoxy resin

HVFF 0.14sq

Color code

Epoxy

Epoxy

0.25t Tin plated 42 Alloy leads

3.0

4.0

2.9

3.3

2.54

0.25

17

1.5

8.5

1

(0.7

)

(0.35

)

Color code

0.25t Tin plated 42 Alloy leads

4.0

4.5

2.9

3.3

2.54

0.25

17

1.5

8.5

1

(0.7

)

(0.9

)

(0.6)

(0.35

)

Other resistance is also available, please ask.

AT-11,AT-2

AT-4

HIGH PRECISION THERMISTOR

9

AT-5 THERMISTOR

103 AT- 5-TP

Taping

Shape

High-precision AT thermistor

Rated zero-power

resistance at 25

C 

Part  number

Specifications

Part No

R

25

B value

Dissipation  factor

(mW/ 

C)

Thermal  time 

constant (s)

Operating  temp.

range(

C)

Rated power

at 25

C (mW)

103AT-5

10.0k

 

1%

3435K

1%

2.5

15

10

50

110

Dimensions

Taping

AT-5

Resistance -Temperature 

24.46

18.68

14.43

11.23

8.834

6.998

5.594

4.501

3.651

2.979

2.449

2.024

1.684

1.408

1.184

1.000

0.8486

11473

7781

5366

3728

2629

1864

1340

969.0

709.5

523.3

390.3

292.5

221.5

168.6

129.5

100.0

77.81

55.66

42.17

32.34

24.96

19.48

15.29

12.11

9.655

7.763

6.277

5.114

4.188

3.454

2.862

2.387

2.000

1.684

154.6

116.5

88.91

68.19

52.87

41.21

32.44

25.66

20.48

16.43

13.29

10.80

8.840

7.267

6.013

5.000

4.179

329.5

247.7

188.5

144.1

111.3

86.43

67.77

53.41

42.47

33.90

27.28

22.05

17.96

14.69

12.09

10.00

8.313

 642.0

 465.8

 342.5

253.6

190.0

143.2

109.1

83.75

64.88

50.53

39.71

31.36

24.96

20.00

16.12

1632

1186

872.8

646.3

484.3

364.6

277.5

212.3

164.0

127.5

99.99

78.77

62.56

50.00

40.20

50

45

40

35

30

25

20

15

10

5

0

5

10

15

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

0.7229

0.6189

0.5316

0.4587

0.3967

0.3446

0.3000

0.2622

0.2285

0.1999

0.1751

0.1536

1.424

1.211

1.033

0.8854

0.7620

0.6587

0.5713

0.4975

0.4343

0.3807

0.3346

0.2949

3.508

2.961

2.509

2.137

1.826

1.567

1.350

1.168

1.014

0.8835

0.7722

0.6771

0.5961

0.5265

0.4654

0.4128

6.940

5.827

4.911

4.160

3.536

3.020

2.588

2.228

1.924

1.668

1.451

1.266

1.108

0.9731

0.8572

0.7576

13.06

10.65

8.716

7.181

5.941

4.943

4.127

3.464

2.916

2.468

2.096

1.788

1.530

1.315

1.134

0.9807

102AT

202AT

502AT

103AT

203AT

503AT

104AT

104AT

Temperature

(

C)

Temperature

(

C)

102AT

202AT

502AT

103AT

203AT

503AT

Unit(k

 

)

32.48

26.43

21.59

17.75

14.64

12.15

10.13

8.482

7.129

6.022

5.105

4.345

3.712

3.185

2.741

2.369

60.94

48.10

38.13

30.44

24.42

19.72

15.99

13.05

10.68

8.796

7.271

6.041

5.037

4.220

3.546

2.994

Type

Type

1253

890.5

3168

2257

Other resistance is also available, please ask.

AT-5 thermistor is available in taping.

3

1

6

1

30

1

3.5

1

2.5

0.5

2.4

1

Epoxy

103AT

0.5 Tin plated CP leads

1

2

3

3

1

9.0

2.0

1.0

16.0

0.5

1

1.0 max.

3.5

1

6.35

1.3

12.7

1.0

12.7

0.3

1 max.

5

0.8

0.2

0.5

0.05

3 max.

4.0

0.3

12.5 min

9.0

0.75

0.5  

18.0 

0.5

2.4

1

2.0 max.

2.0 max.

1.5 max.

0.6

0.3

*1   R

25

 : Rated  zero-power  resistance  value  at  25

C.

*2   B  value : determined  by  rated  zero-power  resistance  at  25

C  and  85

C.

*3   Time when thermistor temperature reaches 63.2% of the  temperature  difference.  The  value  is  measured  in  the  air.

AT-5

10

4 max.

4 max.

1.5 max.

1.6 max.

3

2

4

2

21

1

87

1

45

1

Resin(black)

Resin (ET-2 : light brown, ETB : black)

Soldered terminal

Resin

(0.17)

(0.25)

Enlarged view

Solder plated lead wires

(resin coated insulation)

Solder plated lead wires

(0.17)

(0.25)

Enlarged view

ET-2, ETB

ET-3

ET-1

Part  number

Dimensions

ET  THERMISTOR

The ET thermistor is smaller version of the AT thermistor.

Its fast response time and high reliability makes it

Particularly suitable for use in medical equipment

and thermometers. Manufactured by full-automated

production line, all ET thermistors have identical size and 

that makes it possible to assemble sensors automatically.

503 ET 1

-

ET thermistor

Shape

Rated zero-power resistance at 25

C

503 : 50k

 

Specifications

Part No.

R

25

*

1

B value

*

2

Dissipation  factor

(mW/ 

C)

Thermal  time 

constant (s)

*

3

Operating  temp.

range (

C)

Rated power

at 25

C(mW)

402ET-1(2) 

103ET-1(2)

303ET-1(2)

403ET-1(2)

413ET-1(2)

503ET-1(2)

593ET-1(2)

833ET-1(2)

104ET-1(2)

224ET-1(2)

234ET-1(2)

103ETB

503ET-3

4.0k

 

3%

10.0k

 

3%

30.0k

 

3%

40.0k

 

3%

41.0k

 

3%

50.0k

 

3%

59.0k

 

3%

83.0k

 

3%

100.0k

 

3%

226.0k

 

3%

232.0k

 

3%

10.0k

 

2%

50.0k

 

2%

3100K

1%

3250K

1%

3760K

1%

3525K

1%

3435K

1%

4055K

1%

3617K

1%

4013K

1%

4132K

1%

4021K

1%

4274K

1%

3435K

1%

4086K

1%

0.7

0.7

0.7

0.7

0.7

0.7

0.7

0.7

0.7

0.7

0.7

0.7

0.7

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

6

6

6

6

6

6

6

6

6

6

6

6

6

40

  90

40

  90

40

100

40

100

40

100

40

100

40

100

40

100

40

  90

40

100

40

100

40

  90

40

100

Temperature (

C)

Type

Resistance-Temperature

Unit (k

 

)

Unit (k

 

)

40

30

20

10

0

10

20

30

40

50

60

70

80

90

100

57.71

35.34

22.38

14.60

9.797

6.737

4.736

3.394

2.476

1.835

1.378

1.049

0.7997

0.6145

170.9

102.2

63.07

40.08

26.16

17.51

11.99

8.387

5.988

4.353

3.217

2.414

1.836

1.416

253.7

149.8

91.30

57.31

37.00

24.47

16.56

11.45

8.070

5.791

4.222

3.125

2.346

833.3

481.1

287.5

177.2

112.4

73.00

48.61

33.08

22.96

16.26

11.70

8.569

6.367

4.797

3.662

772.8

456.5

277.9

174.1

111.7

73.63

49.57

34.08

23.89

17.06

12.38

9.135

6.838

5.190

3.990

474.4

272.7

161.9

99.13

62.38

40.24

26.58

17.93

12.33

8.588

6.064

4.338

3.142

445.8

271.7

170.1

109.4

72.10

48.55

33.41

23.44

16.73

12.15

8.951

6.697

5.077

788.5

453.0

269.3

164.8

103.6

66.91

44.18

29.80

20.51

14.37

10.24

7.419

5.459

977.5

559.0

329.8

200.5

125.3

80.27

52.62

35.23

24.00

16.59

11.64

8.287

2116

1225

730.1

447.8

282.1

182.1

120.3

81.07

55.75

39.01

27.78

20.10

14.75

2515

1401

808.2

480.2

293.7

184.4

118.6

78.00

52.39

35.87

24.99

17.72

12.75

204.7

118.5

71.02

43.67

27.70

18.07

12.11

8.301

5.811

4.147

3.011

2.224

1.668

1.267

402ET

103ET

303ET

403ET

413ET

503ET

593ET

833ET

104ET

224ET

234ET

103ETB

Specifications  for  clinical  thermo-meter

Temperature  (

C)

Type

40.22

30.00

21.75

3953

67.04

50.00

36.25

3953

182.4

136.0

98.56

  3958

184.5

135.0

95.87

4209

R

30

R

37

R

45

B

30/45

(K)

503ET

833ET

224ET

234ET

Unit (mm)

 1602

 855.0

1318

754.3

2664

1421

3325

1769

7005

3784

9046

4680

810.7

445.1

Epoxy resin (White)

Polyurethane-covered CP wire

0.16 Color:White

Soldered (Pb free)

100

2

3

1

5max.

1.6max.

*1   R

25

 : Rated  zero-power  resistance  value  at  25

C.

*2   B  value : determined  by  rated  zero-power  resistance  at  25

C  and  85

C.

*3   Time  when  thermistor  temperature  reaches  63.2%  of  the  temperature  difference.  The  value  is  measured  in  the  air.

11

Part  number

Dimensions

Taping

Package

Our newly developed 

IT

 

thermistors are  axial

leaded diode type packaged in high-density resin

mold and featured strength against various operating

environments.

We offer  

IT

 

 

thermistor with 

2% tolerance for a

resistance value of 25

C and 

1% for B value.

IT

 

 thermistors are the most appropriate device for

accurate temperature control below  100

C.

103 I T

IT thermistor

Rated zero-power resistance 

at 25

C 103 : 10k

 

Mark

Reel

Ammopack (Zig-Zag)

Epoxy

0.6 Silver plated

CP wire

2.5

0.1

95

2

76

2

70

2

100

5

260

5

80

5

24

0.5

30

2

350

2

30

2

30

2

3

0.1

103 AA

Lot  NO

103 : 10k

 

Unit (mm)

(mm)

Unit (mm)

Unit (mm)

2

5

6

1.2 max

0.5 max.

Minimum quantity : 5000 pcs/ reel

Minimum quantity : 2000 pcs/box

Label

52

182.1

93.35

49.85

27.75

16.02

9.541

5.876

3.728

2.431

1.623

303.4

155.6

83.09

46.25

26.70

15.90

9.793

6.214

4.051

2.705

367.7

204.7

118.5

71.02

43.67

27.70

18.07

12.11

8.301

5.811

1539

810.8

445.1

253.8

149.8

91.31

57.32

36.99

24.47

16.56

3135

1602

855.0

474.4

272.7

161.9

99.13

62.38

40.24

26.58

9584

4572

2282

1191

647.2

365.0

212.5

127.7

78.88

50.03

1026

540.5

296.7

169.2

99.85

60.87

38.21

24.66

16.31

11.04

Specifications

Part No.

R

25

*

1

B value

*

2

Dissipation  factor

(mW/ 

C)

Thermal  time 

constant (s) 

*

3

Operating  temp.

range (

C)

Rated power

at 25

C (mW)

*

1   R

25

 : Rated  zero-power  resistance  value  at  25

C,  

1%  and  3%  are  also  available.  

*

2   B  value : determined  by  rated  zero-power  resistance  at  25

C  and  85

C.

*

3   Time  when  thermistor  temperature  reaches  63.2%  of  the  temperature  difference.  The  value  is  measured  in  the  air.

302 I T

3.0k

 

2%

5.0k

 

2%

10.0k

 

2%

20.0k

 

2%

30.0k

 

2%

50.0k

 

2%

100.0k

 

2%

3860K

1%

3860K

1%

3435K

1%

3760K

1%

3760K

1%

4055K

1%

4390K

1%

3.6

3.6

3.6

3.6

3.6

3.6

3.6 

13.5

13.5

13.5

13.5

13.5

13.5

13.5

18.0

18.0

18.0

18.0

18.0

18.0

18.0

50

125

50

125

50

100

50

125

50

125

50

125

50

125

Resistance-Temperature

50

40

30

20

10

0

10

20

30

   40

Temperature

(

C)

Temperature

(

C)

1.109

0.7744

0.5513

0.4000

0.2951

0.2210

0.1680

0.1295

0.1142

50

60

70

80

90

100

110

120

125

1.849

1.291

0.9189

0.6667

0.4918

0.3683

0.2800

0.2158

0.1903

4.147

3.011

2.224

1.668

1.267

0.9753

7.632

5.380

3.861

2.815

2.083

1.564

1.190

0.9159

0.8067

11.45

8.070

5.792

4.223

3.125

2.346

1.785

1.374

1.210

17.93

12.33

8.588

6.064

4.338

3.142

2.302

1.705

1.472

32.51

21.61

14.66

10.13

7.135

5.111

3.720

2.746

2.371

Unit (k

 

)

I T  THERMISTOR

Unit

502 I T

103 I T

104 I T

503 I T

302 I T

502 I T

103 I T

203 I T

303 I T

503 I T

104 I T

302 I T

502 I T

203 I T

303 I T

503 I T

104 I T

103 I T

303 I T

203 I T

Type

Type

ACCURATE AXIAL TYPE THERMISTOR

12

1.6

0.15

2.65

0.2

3.80

0.15

0.02

0.05

1.1

0.15

0.6

103

Dimensions

Dimensions

Taping

Taping

42 Alloy

Epoxy resin

Mark

1.6

0.15

3.0

0.3

0.3

0.8

1.1

0.15

2.65

0.2

8.65

0.5

5.25

0.1

1.7

103

Mark

Epoxy resin

Solder plated

lead wires

42 Alloy

0.6

0.1 

(0.1) 

0.8 

0.6 

Unit (mm)

Part  number

HT  THERMISTOR

103 HT

 Shape

 Tolerance of R

25

 Taping  HTF only

Rated zero-power resistance at 25

C 103 

:

 10k

 

HT thermistors are entirely new type of thermistor

for surface mounting (by reflow soldering) and were

acquired from advanced technology.

Our HT thermistors are adapted metal electrodes

packaged in a resin mold, unlike conventional chip

thermistors, and can offer 

2% tolerance for a

resistance value at 25

C.

HT series (SMD Thermistor) is not only compact-

surface mounting type but also highly accurate and

reliable.

182.1

93.35

49.85

27.75

16.02

9.541

5.876

3.728

2.431

1.623

303.4

155.6

83.09

46.25

26.70

15.90

9.793

6.214

4.051

2.705

367.7

204.7

118.5

71.02

43.67

27.70

18.07

12.11

8.301

5.811

1539

810.8

445.1

253.8

149.8

91.31

57.32

36.99

24.47

16.56

3135

1602

855.0

474.4

272.7

161.9

99.13

62.38

40.24

26.58

9584

4572

2282

1191

647.2

365.0

212.5

127.7

78.88

50.03

1026

540.5

296.7

169.2

99.85

60.87

38.21

24.66

16.31

11.04

Specifications

Part No.

R

25

*

1

B value

*

2

Dissipation  factor

(mW/ 

C)

Thermal  time 

constant (s)

*

3

Operating  temp.

range (

C)

Rated power

at 25

C (mW)

*

1

   R

25

 : Rated  zero-power  resistance  value  at  25

C,  

1%  and  3%  are  also  available.  

*

2

   B  value : determined  by  rated  zero-power  resistance  at  25

C  and  85

C.

*

3

   Time  when  thermistor  temperature  reaches  63.2%  of  the  temperature  difference.  The  value  is  measured  in  the  air.

302HT(F)

502HT(F)

103HT(F)

203HT(F)

303HT(F)

503HT(F)

104HT(F)

3.0k

 

2%

5.0k

 

2%

10.0k

 

2%

20.0k

 

2%

30.0k

 

2%

50.0k

 

2%

100.0k

 

2%

3860K

1%

3860K

1%

3435K

1%

3760K

1%

3760K

1%

4055K

1%

4390K

1%

1.0

1.0

1.0

1.0

1.0

1.0

1.0

8.0

8.0

8.0

8.0

8.0

8.0

8.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

50

125

50

125

50

100

50

125

50

125

50

125

50

125

Resistance-Temperature

50

40

30

20

10

0

10

20

30

40

Type

302HT

502HT

103HT

203HT

303HT

503HT

Type

302HT

502HT

103HT

203HT

303HT

503HT

104HT

Temperature

(

C)

Temperature

(

C)

1.109

0.7744

0.5513

0.4000

0.2951

0.2210

0.1680

0.1295

0.1142

50

60

70

80

90

100

110

120

125

1.849

1.291

0.9189

0.6667

0.4918

0.3683

0.2800

0.2158

0.1903

4.147

3.011

2.224

1.668

1.267

0.9753

7.632

5.380

3.861

2.815

2.083

1.564

1.190

0.9159

0.8067

11.45

8.070

5.792

4.223

3.125

2.346

1.785

1.374

1.210

17.93

12.33

8.588

6.064

4.338

3.142

2.302

1.705

1.472

32.51

21.61

14.66

10.13

7.135

5.111

3.720

2.746

2.371

Unit (k

 

)

4.0

0.1

1.9

0.1

4.0

0.1

1.45

0.1

2.0

0.1

1.75

0.1

16.0

0.2

7.5

0.1

0.2

0.05

1.55

0.05

1.5

0.1

1.9

0.1

4.0

0.1

4.0

0.1

2.0

0.1

3.55

0.1

1.55

0.1

8.0

0.2

0.2

0.05

(1.45)

4.1

0.1

104HT

-TP

-

1P 

:

 

1%  2P 

:

 

2%

HT

HTF

9.3

0.1

Minimum quantity:3000pcs/reel

0.2

0

SURFACE MOUNT TYPE THERMISTOR

13

0.44

0.03

0.5

0.1

0.15

0.05

1.0

0.1

0.22

0.03

0.22

0.03

Part  number

Dimensions

FT  THERMISTOR

The FT thermistors, the highly reliable thermistors, are  

characterized by their fast response time, which was 

made possible by the miniaturization of the thermistor 

dimensions. FT  thermistors are also heat-resistant type.

FT thermistors are the most excellent products of today

,

s 

chip thermistors manufacturing.

364 FT

Thin film thermistor

Rated zero-power Resistance

 at 25

C : 364k

 

Temperature

(

C)

Resistance -Temperature

20

10

0

10

20

25

30

40

50

60

70

80

90

100

110

B=3370K

67.26

42.10

27.08

17.86

12.07

10.00

8.332

5.871

4.216

3.081

2.288

1.725

1.318

1.021

0.8003

B=3435K

70.34

43.55

27.71

18.11

12.12

10.00

8.299

5.804

4.139

3.006

2.220

1.666

1.269

0.9797

0.7662

B=3370K

336.3

210.5

135.4

89.31

60.33

50.00

41.66

29.36

21.08

15.40

11.44

8.623

6.592

5.105

4.002

B=3435K

351.9

217.7

138.5

90.48

60.58

50.00

41.50

29.03

20.70

15.04

11.11

8.331

6.344

4.898

3.829

B=3370K

2447

1532

985.4

650.0

439.1

363.9

303.2

213.7

153.4

112.1

83.25

62.76

47.98

37.15

29.12

103FT

503FT

364FT

P/N

Temperature

(

C)

120

125

130

140

150

160

170

180

190

200

210

220

230

240

250

B=3370K

0.6345

0.5671

B=3435K

0.6064

0.5418

B=3370K

3.172

2.836

B=3435K

3.029

2.706

B=3370K

23.09

20.64

18.50

14.97

12.23

10.07

8.364

7.000

5.901

5.008

4.277

3.676

3.177

2.760

2.411

103FT

503FT

364FT

P/N

Specifications

Part No.

R

25

*

1

B value

*

2

Dissipation  factor

(mW/ 

C)

Thermal  time 

constant (s)

*

3

Operating  temp.

range (

C)

Rated power

at 25

C (mW)

*

1   R

25

 : Rated  zero-power  resistance  value  at  25

C.

*

2   B  value : determined  by  rated  zero-power  resistance  at  25

C  and  85

C.

*

3   Time  when  thermistor  temperature  reaches  63.2%  of  the  temperature  difference.  The  value  is  measured  in  the  air.

103FT

103FT

503FT

503FT

364FT

10k

 

5%

10k

 

5%

50k

 

5%

50k

 

5%

364k

 

5%

3435K

1%

3370K

1%

3435K

1%

3370K

1%

3370K

1%

0.3

0.3

0.3

0.3

0.3

2.0

2.0

2.0

2.0

2.0

1.5

1.5

1.5

1.5

1.5

20

125

20

125

20

125

20

125

20

250

Unit (mm)

(0.5)

Glass

Unit (k

 

)

Connect  the  FTs  to  the  electrodes with using  conductive  epoxy  resins.

The  FTs  cannot  be  soldered  onto  the  electrodes.

THIN FILM TYPE THERMISTOR

14

SMD type chip 

Chip thermistors are specially processed, highly

reliable thermistors.  

They can be face-bonded to act as thermal 

compensators for ICs and they are manufactured

in sizes down to 1 square mm, they can also be 

used to detect temperature with relatively small

time constants. 

Precautions

Dimensions

Reflow soldering profile 

103  K T  2125T - 

Rated zero-power resistance at 25

C 103:10k

 

Part  number

Chip thermistor

1P:

1%,2P:

2%,3P:

3%

Dimension(EIAJ) 2125

Specifications

Part No.

R

25

*1

B value*

2

Dissipation  factor

(mW/ 

C)

Thermal  time 

constant(s)*

3

Operating  temp.

range( 

C)

Rated power

at 25 

C(mW)

*1   R

25

 : Rated  zero-power  resistance  value  at  25

C.

*2   B  value : determined  by  rated  zero-power  resistance  at  25

C  and  85

C.

*3   Time  when  thermistor  temperature  reaches  63.2%  of  the  temperature  difference.  The  value  is  measured  in  the  air.

   Other resistance is available, please ask.

103KT2125T

103KT1608T

503KT1608T

104KT1608T

103KT1005T

10k

 

10k

 

50k

 

100k

 

10k

 

3435K

1%

3435K

1%

4055K

1%

4390K

1%

3435K

1%

1.0

0.9

0.9

0.9

0.7

7.5

5.0

5.0

5.0

2.2

5.0

4.5

4.5

4.5

3.5

40

125

40

125

40

125

40

125

40

125

Unit(mm)

1.5

(1.0

0.1)

1.65

0.2

4.0

0.1

4.0

0.1

2.0

0.05

3.5

0.05

1.75

0.1

8.0

0.3

1.5max.

(0.25max.)

(  ):1608type

0.3max.

0.1

0

2.4

0.2

(1.85

0.1)

Taping (2125, 1608 type)

   Do not expose the thermistors to high

   soldering heat for more than specified time.

   (260

C for not longer than 10s is 

   recommended)

Unit(mm)

L

L

1

L

1

W

Glass coating

Electrode

(Sn plated)

190

C

15

C

260

C

5

C

Temperature

Time

Soldering

Cooling

Preheat(air)

120s

30s

1

2

C/s

10s 

max.

Minimum quantity:4000pcs/reel

Minimum quantity:10000pcs/reel

Unit(mm)

 (1005 type)

T

EIA

0402

0603

0805

EIAJ

1005

1608

2125

L

1.00

0.15

1.60

0.15

2.00

0.20

W

0.50

0.10

0.80

0.15

1.25

0.20

T

0.6max.

0.95max.

1.2max.

L

1

0.15

0.30

0.20

0.50

0.20

0.50

2.0

0.05

0.66

0.03

0.9max

0.75

0.02

4.0

0.1

0.6

0.10

2.0

0.10

1.75

0.1

3.5

0.05

8.3 max

1.5

0.1

0

1.10

0.10

CHIP TYPE THERMISTOR

15

3

1

1.35

0.15

48

1

Glass

Nickel-plated

(0.15)

(0.18)

Part  number

Time constant

Dimensions

GT  THERMISTOR

GT thermistor is combined both superior feature of   

BT thermistor and ET thermistor as fast response 

time, high reliability, wide category temperature 

range, high moisture proof, high accuracy and 

reasonable price.

GT thermistor is made up of a high quality

thermistor element and the lead wire is connected to

the thermistor element by alloyed technology, and

glass coating for the thermistor element.

103 GT 1

-

GT thermistor

Shape

Rated zero-power resistance at 25

C

103 

:

 10k

 

100

95.0

86.5

80

63.2

60

40

20

0

0

2

4

6

8

10

12

(%)

Time (s)

in air

in silicone oil

Specifications

Part No.

R

25

*

1

B value

*

2

Dissipation  factor

(mW/ 

C)

Thermal  time 

constant(s)

*

3

Operating  temp.

range(

C)

Rated power

at 25

C(mW)

*

1

   R

25

 : Rated  zero-power  resistance  value  at  25

C.   

*

2

   B  value : determined  by  rated  zero-power  resistance  at  25

C  and  85

C.

*

3

   Time  when  thermistor  temperature  reaches  63.2%  of  the  temperature  difference.  The  value  is  measured  in  the  air. (silicone  oil)

102GT-1

202GT-1

502GT-1

103GT-1

203GT-1

503GT-1

104GT-1

204GT-1

504GT-1

105GT-1

3305K

2%

3838K

2%

3964K

2%

4126K

2%

4282K

2%

4288K

2%

4267K

2%

4338K

2%

4526K

2%

4608K

2%

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

3

3

3

3

3

3

3

3

3

3

7(0.6)

7(0.6)

7(0.6)

7(0.6)

7(0.6)

7(0.6)

7(0.6)

7(0.6)

7(0.6)

7(0.6)

50

200

50

300

50

300

50

300

50

300

50

300

50

300

50

300

50

300

50

300

Resistance-Temperature

Temperature  (

C)

Type

Unit (k

 

)

102GT

202GT

502GT

103GT

203GT

503GT

104GT

204GT

504GT

105GT

50

40

30

20

10

0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

32.57

18.48

10.84

6.594

4.144

2.675

1.773

1.203

0.8354

0.5918

0.4273

0.3141

  0.2347

0.1782

0.1373

0.1072

111.3

61.34

33.69

18.79

10.82

6.424

3.939

2.489

1.618

1.080

0.7390

0.5170

0.3695

0.2693

0.1998

0.1507

0.1154

342.1

175.4

92.54

50.44

28.49

16.66

10.06

6.264

4.019

2.651

1.792

1.239

0.8753

0.6304

0.4624

0.3450

0.2614

0.2010

0.1566

0.1236

825.1

405.3

206.6

109.9

60.72

34.82

20.66

12.64

7.968

5.164

3.436

2.341

1.631

1.159

0.8391

0.6181

0.4626

0.3514

0.2706

0.2111

0.1666

0.1330

0.1073

1901

909.0

453.2

236.6

128.3

72.32

42.24

25.47

15.82

10.10

6.620

4.444

3.050

2.138

1.527

1.111

0.8209

0.6160

0.4686

0.3613

0.2820

0.2226

0.1777

0.1432

    0.1166

4613

2199

1100

576.2

315.1

178.8

104.9

63.52

39.62

25.37

16.64

11.16

7.645

5.338

3.795

2.742

2.014       

1.501

1.133

0.8662

0.6704

0.5247

0.4149

0.3314

0.2673

0.2174

0.1784

0.1475

0.1230

0.1032

8743

4218

2132

1127

620.0

353.7

208.6

126.8

79.36

50.96

33.49

22.51

15.44

10.80

7.686

5.556

4.082

3.043

2.298

1.758

1.360

1.064

0.8414

0.6714

0.5408

0.4393

0.3597

0.2969

0.2468

0.2065

0.1740

0.1475

0.1258

0.1079

0.09305

0.08065

8810

4436

2329

1272

720.3

421.8

254.6

158.2

100.8

65.85

43.99

29.98

20.82

14.71

10.57

7.720

5.720

4.296

3.269

2.516

1.958

1.539

1.222

0.9796

0.7919

0.6455

0.5303

0.4389

0.3658

0.3068

0.2591

0.2201

0.1881

0.1616

0.1396

12091

6268

3372

1880

1083

642.3

391.9

245.4

157.5

103.3

69.20

47.23

32.84

23.22

16.68

12.15

8.976

6.719

5.091

3.903

3.024

2.367

1.871

1.492

1.200

0.9726

0.7946

0.6539

0.5418

0.4519

0.3793

0.3203

0.2720

0.2323

6920

3833

2190

1289

780.9

485.2

309.0

201.2

133.6

90.53

62.49

43.90

31.34

22.69

16.65

12.39

9.330

7.107

5.472

4.255

3.339

2.644

2.113

1.702

1.382

1.131

0.9323

0.7735

0.6459

0.5424

0.4583

0.3894

Unit (mm)

1.0k

 

3%

2.0k

 

3%

5.0k

 

3%

10.0k

 

3%

20.0k

 

3%

50.0k

 

3%

100.0k

 

3%

200.0k

 

3%

500.0k

 

3%

1000.0k

 

3%

0.08483

0.06787

0.05488

0.04483

0.03697

0.03077

0.02584

0.02189

0.01869

0.01610

0.08973

0.07068

0.05638

0.04550

0.03715

0.03065

0.02556

0.02151

0.01826

0.09865

0.07967

0.06501

0.05358

0.04457

0.03741

0.03167

0.02703

0.02324

0.02014

0.01759

0.08741

0.07186

0.05960

0.04986

0.04204

0.03573

0.03059

0.02640

0.09573

0.07929

0.06620

0.05570

0.04722

0.04030

HIGH HEAT-RESISTANCE

AND HIGH SENSITIVE THERMISTOR

16

1.35max.

1.5max.

70 min.

Glass

Glass

Part number

Dimensions

BT  THERMISTOR

The BT thermistor is a small thermal sensing device 

providing high reliability, stable characteristics and a   

wide operating range of

50

C to 300

C. 

It is used in various applications including medical

apparatus, industrial equipment and home electric

appliances. 

10 BT 5

-

Bead thermistor

Shape

Rated zero-power resistance at 25

C 10:10k

 

4.5max.

70 min.

3.5max.

0.225

Dumet leads

0.2

Dumet leads

Fig.2

(BT-6)

Fig.1

(BT-5)

Specifications

Port No.

R

25

*1

B  value

*2

Dissipation  factor

(mW/ 

C)

Thermal  Time 

constant(s)

*3

Operating  temp.

range(

C)

Rated power

at 25

C(mW)

*

1  R

25

 : Rated  zero-power  resistance  value  at  25

C, 

5%  are  also  available.     

*

2  B  value : determined  by  rated  zero-power  resistance  at  25

C  and  85

C.

*

3  Time  when  thermistor  temperature  reaches  63.2%  of  the  temperature  difference.  The  value  is  measured  in  the  air

1BT-5

2BT-5

5BT-5(6)

9BT-5(6)

10BT-5(6)

20BT-5(6)

30BT-5(6)

40BT-5(6)

100BT-5(6)

400BT-5(6)

500BT-5(6)

1.3MBT-5(6)

1.000k

 

10%

2.000k

 

10%

5.000k

 

10%

9.000k

 

10%

10.00k

 

10%

20.00k

 

10%

30.00k

 

10%

40.00k

 

10%

100.0k

 

10%

400.0k

 

10%

500.0k

 

10%

1300k

 

10%

3,250K

3%

3,420K

3%

3,450K

3%

3,470K

3%

3,250K

3%

3,330K

3%

3,450K

3%

3,550K

3%

3,750K

3%

4,050K

3%

3,760K

3%

4,380K

3%

0.5(0.4)

0.5(0.4)

0.5(0.4)

0.5(0.4)

0.5(0.4)

0.5(0.4)

0.5(0.4)

0.5(0.4)

0.5(0.4)

0.5(0.4)

0.5

0.5

4

12

4

12

4

12(3

8)

4

12(3

8)

4

12(3

8)

4

12(3

8)

4

12(3

8)

4

12(3

8)

4

12(3

8)

4

12(3

8)

4

12(3

8)

4

12(3

8)

50

150

50

300

50

300

50

300

50

300

50

300

50

300

50

300

50

300

50

300

50

300

50

150

2.5

2.5

2.5(2)

2.5(2)

2.5(2)

2.5(2)

2.5(2)

2.5(2)

2.5(2)

2.5(2)

2.5(2)

2.5(2)

Temperature  (

C)

Type

Resistance-Temperature

50

40

30

20

10

0

10

20

25

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

29.87

17.33

10.35

6.374

4.038

2.629

1.755

1.200

1.000

0.8380

0.5973

0.4338

0.3205

0.2407

0.1834

0.1417

0.1110

0.08789

  

70.71

40.02

23.28

13.96

8.640

5.513

3.610

2.421

2.000

1.661

1.163

0.8311

0.6043

0.4468

    0.3357

0.2559

0.1978

0.1547

0.1224

0.09789

0.07908

0.06450

35.44

21.84

13.87

9.057

6.060

5.000

4.148

2.898

2.065

1.497

1.104

0.8267

0.6280

0.4836

0.3771

0.2975

0.2373

0.1913

0.1556

0.1278

0.1058

0.08836

0.07432

0.06295

344.8

190.3

109.1

64.81

39.70

25.15

16.36

10.92

9.000

7.456

5.200

3.698

2.677

1.970

1.473

1.117

0.8581

0.6685

0.5264

0.4191

0.3369

0.2735

284.8

163.4

97.62

60.41

38.63

25.45

17.22

11.92

10.00

8.434

6.084

4.456

3.303

2.460

1.850

1.405

1.078

0.8355

0.6540

0.5171

0.4126

0.3321

0.2696

0.2207

0.1818

0.1508

0.1258

0.1056

686.7

383.1

222.6

134.2

83.61

53.75

35.53

24.09

20.00

16.70

11.81

8.511

6.248

4.658

3.522

2.698

2.093

1.640

1.296

1.027

0.8190

0.6581

0.5327

0.4345

0.3567

0.2947

0.2451

0.2052

83.80

54.46

36.37

30.00

24.88

17.39

12.40

8.990

6.629

4.962

3.767

2.897

2.255

1.774

1.410

1.130

0.9113

0.7374

0.5997

0.4909

0.4048

0.3360

0.2808

0.2360

0.1995

0.1695

0.1447

0.1243

0.1072

0.09283

0.08078

0.07060

306.8

184.7

115.0

73.88

48.77

40.00

33.00

22.82

16.10

11.57

8.457

6.279

4.730

3.611

2.792

2.182

1.727

1.378

1.107

0.8943

0.7252

0.5915

0.4859

0.4018

0.3344

0.2802

0.2361

0.2000

0.1704

0.1458

0.1255

0.1084

0.09408

0.08200

4860

2599

1439

827.4

491.1

301.4

190.1

123.1

100.0

81.71

55.39

38.31

27.00

19.38

14.14

10.48

7.866

5.968

4.580

3.551

2.782

2.201

1.757

1.416

1.150

0.9418

0.7770

0.6458

0.5403

0.4551

0.3855

0.3286

0.2816

0.2426

0.2100

0.1826

0.1595

1486

945.3

614.7

500.0

408.9

277.7

192.1

135.3

96.90

70.47

52.00

38.90

29.49

22.63

17.55

13.76

10.90

8.717

7.034

5.722

4.692

3.876

3.225

2.702

2.277

1.930

1.644

1.407

1.209

1.041

0.8995

0.7810

8066

4598

2718

1652

1300

1029

656.0

427.8

284.5

193.0

133.0

92.76

65.53

46.91

34.03

25.02

18.59

13.99

10.63

8.163

   6.336

4.965

3.926

3.131

2.517

2.039

1.663

1.366

1.129

0.9398

0.7871

0.6628

0.5612

1BT

2BT

5BT

9BT

10BT

20BT

30BT

40BT

100BT

400BT

500BT

1.3MBT

11043

6198

3573

2109

1274

788.4

498.7

400.0

322.4

212.8

143.3

98.24

68.52

48.50

34.91

25.47

18.83

14.10

10.68

8.180

6.332

4.957

3.915

3.120

2.508

2.032

1.658

1.363

1.127

0.9390

0.7864

0.6626

0.5613

0.4780

0.4091

0.3518

  

Unit(k

 

)

17

CT THERMISTOR

The CT thermistor is a thermal sensor in a DO35

package. Similar to the BT thermistor, it is highly

reliable and offers a wide operating range of 

50

C 

to 250

C. It is primarily used in home electric 

appliances 

and features a competitive price for  

full-automated manufacturing system.

 

512 CT- 4

Shape

CT-Thermistor

Rated zero-power resistance 

at 25

C  512 : 5.1k

 

Part  number

Dimensions

Resistance -Temperature

Glass encapsulated

0.5

 Nickel-plated

4.0 max.

28

1

28

1

1.8

 

To allow automatic insertion, this product can be taped.

Temperature  (

C)

Type

252CT

512CT

562CT

912CT

103CT

113CT

203CT

473CT

513CT

563CT

104CT

204CT

             

50

40

30

20

10

0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

120.2

65.60

36.48

20.91

12.32

7.516

4.738

3.074

2.045

1.393

0.9698

0.6895

0.4993

0.3680

0.2757

0.2098

0.1620

0.1267

0.1003

0.08028

0.06494

0.05302

0.04369

0.03630

0.03039

0.02562

137.9

81.02

48.93

30.56

19.65

12.96

8.779

6.080

4.296

3.095

2.267

1.687

1.270

0.9650

0.7402

0.5735

0.4493

0.3559

0.2847

0.2298

0.1870

0.1534

0.1267

0.1055

0.08833

0.07445

151.4

88.96

53.73

33.55

21.58

14.23

9.639

6.676

4.717

3.398

2.489

1.852

1.394

1.060

0.8128

0.6298

0.4933

0.3908

0.3126

0.2524

0.2053

0.1684

0.1391

0.1158

0.09699

0.08175

94.62

58.02

36.67

23.82

15.92

10.91

7.626

5.441

3.952

2.918

2.184

1.656

1.269

0.9787

0.7605

0.5952

0.4702

0.3750

0.3016

0.2444

0.1996

0.1643

0.1362

0.1136

0.09541

0.08063

0.06853

0.05857

0.05031

104.0

63.76

40.29

26.18

17.49

11.99

8.381

5.980

4.342

3.206

2.400

1.820

1.394

1.076

0.8357

0.6540

0.5168

0.4121

0.3314

0.2686

0.2193

0.1805

0.1496

0.1249

0.1049

0.08860

0.07531

0.06436

0.05529

114.4

70.13

44.32

28.79

19.24

13.18

9.219

6.578

4.777

3.527

2.640

2.002

1.534

1.183

0.9193

0.7194

0.5684

0.4533

0.3646

0.2955

0.2413

0.1986

0.1646

0.1374

0.1153

0.09746

0.08284

0.07080

0.06082

81.00

52.63

35.15

24.01

16.74

11.88

8.570

6.239

4.581

3.401

2.553

1.937

1.489

1.156

0.9075

0.7191

0.5752

0.4638

0.3771

0.3091

0.2552

0.2122

0.1777

0.1497

0.1269

0.1082

0.09271

127.1

84.16

56.86

39.01

27.07

19.05

13.58

9.807

7.187

5.327

3.997

3.040

2.337

1.815

1.425

1.129

0.9031

0.7280

0.5919

0.4849

0.4000

0.3324

0.2780

0.2339

0.1979

0.1683

138.0

91.32

61.70

42.33

29.37

20.67

14.74

10.64

7.798

5.781

4.337

3.298

2.535

1.969

1.546

1.226

0.9799

0.7899

0.6422

0.5261

0.4341

0.3607

0.3016

0.2538

0.2147

0.1827

151.5

100.3

67.75

46.47

32.25

22.70

16.18

11.68

8.559

6.348

4.762

3.622

2.784

2.162

1.698

1.346

1.076

0.8674

0.7052

0.5777

0.4766

0.3961

0.3312

0.2787

0.2358

0.2006

272.2

179.4

120.9

83.11

58.23

41.52

30.14

22.19

16.57

12.52

9.586

7.434

5.827

4.619

3.694

2.982

2.428

1.992

1.647

1.371

1.149

0.9697

0.8235

0.7033

0.6038

0.5208

553.6

362.5

242.5

165.7

115.3

81.91

59.14

43.36

32.28

24.33

18.57

14.36

11.24

8.900

7.108

5.732

4.666

3.829

3.168

2.641

2.216

1.871

1.591

1.360

1.169

1.010

Specifications

Part No.

R

25

*

1

B value*

2

Dissipation  factor

(mW/

C)

Thermal  time 

constant (s)*

3

Operating  temp.

range(

C)

Rated power

at 25

C(mW)

*1   R

25

 : Rated  zero-power  resistance  value  at  25

C.

*2   B  value : determined  by  rated  zero-power  resistance  at  25

C  and  85

C.

*3   Time  when  thermistor  temperature  reaches  63.2%  of  the  temperature  difference.  The  value  is  measured  in  the  air.

252CT-4

512CT-4

562CT-4

912CT-4

103CT-4

113CT-4

203CT-4

473CT-4

513CT-4

563CT-4

104CT-4

204CT-4

2.5k

 

5%

5.1k

 

5%

5.6k

 

5%

9.1k

 

5%

10.0k

 

5%

11.0k

 

5%

20.0k

 

5%

47.0k

 

5%

51.0k

 

5%

56.0k

 

5%

100.0k

 

5%

200.0k

 

5%

3670K

2%

3200K

2%

3200K

2%

3270K

2%

3270K

2%

3270K

2%

3410K

2%

3610K

2%

3610K

2%

3610K

2%

3450K

2%

3500K

2%

2.1

2.1

2.1

2.1

2.1

2.1

2.1

2.1

2.1

2.1

2.1

2.1

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10

20

10

20

10

20

10

20

10

20

10

20

10

20

10

20

10

20

10

20

10

20

10

20

50

250

50

200

50

200

50

250

50

250

50

250

50

250

50

250

50

250

50

250

50

250

50

250

Unit(mm)

Unit(k

 

)

18

TEMPERATURE COMPENSATION

D THERMISTOR

The D thermistor, based on resistance changes, is

used in transistor, coil and other temperature

compensating circuits found in TV

,

s, radio, etc.

1K D- 5

Diameter

Disk thermistor

Rated zero-power resistance at 25

C

1k:1k

 

Part  number

Dimensions

Taping

35 min.

5.0 max.

6.0max.

Resin

Soldered CP wire

3.5

1.0

0.5

6.35

1.3

0

2.0

6.0 max.

5.0 max.

1.5 max.

20.0

1.5

1.0

9.0

0.75

0.5

18.0

1.0

0.5

5.0

0.8

0.2

3.85

0.7

12.7

0.3

12.7

1.0

0.5

0.05

11.0 max.

2.0 max

32.25 max.

3.0 max.

12.5 min.

4.0

0.3

4

1

16.0

0.5

0.535

0.2

2,500pcs/box

Unit (mm)

Unit(mm)

Specifications

Part No.

R25*

1

B value*

2

Dissipation factor

(mW/

C)

Thermal time 

constant(s)*

3

Operating temp.

range(

C)

Rated power

at 25

C(mW)

*1   R

25

 : Rated  zero-power  resistance  value  at  25

C,  

10%  are  also  available.  

*2   B  value : determined  by  rated  zero-power  resistance  at  25

C  and  85

C.

*3   Time  when  thermistor  temperature  reaches  63.2%  of  the  temperature  difference. 

         The  value  is  measured  in  the  air.

50D-5

80D-5

100D-5

200D-5

250D-5

300D-5

360D-5

500D-5

800D-5

1KD-5

1.5KD-5

2KD-5

5KD-5

8KD-5

10KD-5

15KD-5

20KD-5

25KD-5

50KD-5

100KD-5

50.0

 

15%

80.0

 

15%

100.0

 

15%

200.0

 

15%

250.0

 

15%

300.0

 

15%

360.0

 

15%

500.0

 

15%

800.0

 

15%

1.0k

 

15%

1.5k

 

15%

2.0k

 

15%

5.0k

 

15%

8.0k

 

15%

10.0k

 

15%

15.0k

 

15%

20.0k

 

15%

25.0k

 

15%

50.0k

 

15%

100.0k

 

15%

3250K

5%

3300K

5%

3300K

5%

3400K

5%

3450K

5%

3500K

5%

3550K

5%

3650K

5%

3850K

5%

3950K

5%

3950K

5%

4000K

5%

4100K

5%

4200K

5%

4200K

5%

4250K

5%

4300K

5%

4300K

5%

4650K

5%

4850K

5%

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

13

13

13

13

13

13

13

13

13

13

13

13

13

13

13

13

13

13

13

13

297

297

297

297

297

297

297

297

297

297

297

297

297

297

297

297

297

297

297

297

40

110

40

110

40

110

40

110

40

110

40

110

40

110

40

110

40

110

40

110

40

110

40

110

40

110

40

110

40

110

40

110

40

110

40

110

40

110

40

110

19

3. Dimensions

29

27

27

33

Housing 

Housing 

Thermistor 

Thermistor 

Thermistor 

Thermistor

Window

Window

Lead wire

Lead wire

Evaporator Pipe

18

R4.3

5

1

5

(mm)

FROST DETECTING SENSOR

FD SENSOR

1. Application

Any frost-free system found in domestic and commercial fridge-freezers,

vending machines, ice-makers, etc.

2. Features

Simple detecting principle

Highly sensitive

Ease of assembly

Replaces less-efficient conventional sensors

The FD Sensor has been developed to detect the level of accumulated frost 

on the evaporator in frost-free systems, such as those found in  domestic 

fridge-freezers. It helps to eliminate unnecessary defrost cycles and also 

increases the energy efficiency of the system. 

4. Findings from studies carried on the FD Sensor

5. Specifications

6. Reliability

     Climatic test properties

7. Mechanical properties

   NTC Thermistor characteristics(only for reference)

Power Consumption

No. of defrost cycle completed

Conventional Fixedtime defrost system

Defeost system with FD Sensor

Improved efficiency 

74.16KK Whr/month

65.6KK Whr/month

12%

9 times/week

Once/week

Criteria

Dry heat

Test

Test Conditions

In air at 100

C  for 1,000hr.

Between 

40

C and 

75

C for 10,000 cycles.

In air at 

55

C for 1,000hr.

95% RH at 40

C for 1,000hr.

Cold

Damp heat

Thermal shock

Deviation of resistance at 25

C from the original value

after test within 

2% and deviation of B value(B25

85)

from the original value after test is within 

1%.

Criteria

Free Fall

Test

Test Conditions

3 natural drops from 75 cm high

JIS C2571   Item A

40 N for 10 seconds

Robustness of

termination

Vibration

Deviation of resistance at 25

C from the original value

after test within 

2% and deviation of B value(B25

85)

from the original value after test is within 

1%.

Study (A)

A 12% of energy saving in a 420 liter domestic frost-free fridge-freezer was found by one of the major Japanese refrigerator manufacturers by the following test 

procedures.

Test Procedure

The power consumption measurement was carried out in accordance with  

JIS C9607 power consumption test, item B (    ISO8561).

The test procedure was extended to one week to determine the full advantage of the defrost system using the FD Sensor.

Study (B)

Evaluation of the FD Sensor in a 130 liter domestic frost-free fridge-freezer was made by another Japanese refrigerator manufacturer.

They obtained an energy saving of over 10% using the same test method as in 5(A) above but including the opening and closing the fridge-freezers 

doors.

Study (C)

FD Sensor

1) Environmental Temperature range : 

40

C

80

C

2) Operating temperature range          : 

40

C

5

C

3) Sensitivity                                        : 4

C

12

C

     (Difference in temperature measured by both NTC Thermistors when no frost is recognized.)

Evaluation of the FD Sensor in a 400 liter domestic frost-free fridge-freezer made by a Japanese refrigerator manufacturer shows an energy saving of over 10%.

 Measurement of this energy saving was made using the test method specified as in 5(A) above. 

1) Nominal Zero power resistance                    : R25

10k

 

 

3%

2) Rated B value                                               : B25

85

3435K 

1%

3) Absolute difference between the two NTCs : 

0.2% or 

0.05

C at 25

C

20

TEMPERATURE SENSOR

The TEMPERATURE SENSOR is assembled one with various parts

and thermistor devices according to the required applications. lts

electric characteristics are the same as those of thermistor devices.

Variable type of sensor can be utilized for detecting or controlling

temperature because its operating temperature range is wide from

50 to  

300

C. Standard TEMPERATURE SENSOR is available in

accordance with the applications such as measurements of liquid, 

atmosphere and surface temperature. 

External dimensions

Fig 1

Fig 2

Fig 3

Fig 5

Fig 4

Fig 6

Fig 7

Fig 8

Fig 10

Fig 9

Fig 11

Fig 12

Fig 13

Fig 15

Fig 14

Unit (mm)

THERMISTOR

THERMISTOR

THERMISTOR

THERMISTOR

THERMISTOR

TAPE

RESIN

RESIN

TUBE

LEAD WIRE

SHRINK TUBE

LEAD WIRE

LEAD WIRE

LEAD WIRE

LEAD WIRE

COPPER PLATE

EPOXY

THERMISTOR

LEAD WIRE

COPPER PIPE

3

3

7

6

2.4

5

5

6

12

25

5

17

15

23

EPOXY

3.5

5

5.5max.

TUBE

13

25

5

6.5max.

25

25

40

SUS PIPE

THERMISTOR

LEAD WIRE

RESIN PIPE

THERMISTOR

LEAD WIRE

SUS PIPE

EPOXY

LEAD WIRE

2.5max.

8max.

THERMISTOR

SHRINK TUBE

LEAD WIRE

3.5

30

16

7.8

THERMISTOR

LEAD WIRE

THERMISTOR

BRASS

SCREW M5

LEAD WIRE

SCREW PT1/8

6

50

12

10 5.5

THERMISTOR

SUS PIPE

LEAD WIRE

COPPER CASE

23

13.3

14

7.5

30

THERMISTOR

TUBE

THERMISTOR

LEAD WIRE

NUT

6

14

4

8

Specifications

Fig

Thermal  Time  constant(s)

Air

Water

Dissipation  factor

mW/

C

Operating  temperature  range

Application

Thermistor

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

  75

  40

  70

130

  65

  10

 

 

  70

  30

  85

130

260

    5

 3

Heater

3

1.0

      

      

     

1.2

3

4

5

4

3

2

4.5

1.1

5

2.7

3

1.5

2.6

2.6

30

C

230

C

30

C

105

C

30

C

105

C

30

C

110

C

30

C

110

C

30

C

105

C

30

C

90

C

30

C

105

C

50

C

200

C

50

C

170

C

30

C

100

C

50

C

205

C

30

C

100

C

30

C

105

C

30

C

105

C

Surface  temp.  sensor  for  OA  equipment.

Air  temp. sensor  for  general  use.

Surface  temp.  sensor  for  general  use.

Air  temp. sensor  for  air  conditioner.

Air  temp. sensor  for  air  conditioner.

Surface  temp.  sensor  for  general  use.

Surface  temp.  sensor  for  rechargeable  battery.

Water (Oil) 

 temp.  sensor  for  general  use.

For  general  use.

Inner  temp.  sensor  for  general  use.

Fast  response  water  temp.  sensor

Surface  temp.  sensor  for  cooker.

Air  temp. sensor  for  general  use.

For  general  use.

For  general  use. 

BT

AT

AT

AT(ET)

AT(ET)

AT

AT

AT(ET, GT)

BT

GT(AT, ET)

ET

CT

ET

AT(ET)

AT(ET)

3.1

0.2

0.1

6.4

0.3

1.9

0.3

3.2

0.3

8.8

0.4

21

POWER

THERMISTOR

The POWER THERMISTOR is a device for

suppressing inrush current to an electric

circuit. Circuits including electric bulbs or

capacitors induce a inrush current more

than 100 times the normal current when the

circuit switch is turned on. The POWER

THERMISTOR in the circuits protects

electric equipments from being damaged

by limiting the inrush current.

MARK    is a NEW POWER THERMISTOR

featuring smaller size and larger energy

capacity to meet severe requirements in

inrush current suppression.

There is the tendency of miniaturization in

low power switching power supply, and

MARK    is effectively applicable for the

needs, though the comparatively larger

sized fixed resistors (ceramic coat) are

used now.

Application

How to use the power thermistor

The power thermistor will suppress inrush current

which is caused by a capacitor, filament for a bulb,

inverter for fluorescent lamp, a heater and etc., also

will control fan motor speed of cooler for electric

circuit.

Especially MARK    was developed to use for power

supply of TV, VCR instead of cement resistor.

Accordingly, suitable thermistors are 6D-22, 5D-18

and 8D-18, and if we consider in the points of small

time constant which means a small size and large

effect for suppressive current which means large

rated zero-power resistance, 8D-18 is the most

suitable one.

Use the following circuit in the power supply for 100V

and 200V.

The most suitable power thermistor for the above

circuit is required to fulfill the following terms and

conditions.

1. The permissible current at ambient temperature of

    55

C should be over 2A.

2. The thermistor resistance for suppressive current

    which becomes below 30A should be over 4.2

    ohm from the under-mentioned formula.

t

SW

V

E

I

O

C

L

Input voltage 

: AC 100V

10%

Steady state current 

: 2A

Capacitor 

: 2000

F

Ambient temperature 

: Max.55

C

Suppressive current 

: Max.30A at 25

C

SW

1

SW

2

C

2

C

1

V

E

L

2 V

E

1.1

30

R

C

R

25

R

C

 

:

 Internal resistance value in the circuit is 1 ohm

        (100V/100A)

R

25

 

:

 Rated zero-power resistance at 25

C

3. Max. capacitance shall be over 2000

F at AC 100V.

SW

2

 : ON (200V), OFF (100V)

t

t

22

Thermal time constant

If ambient temperature of a thermistor is changed

to T

1

 from T

2

 suddenly, temperature of the thermistor

changes slowly.

The time constant means the time when temperature

of the thermistor reaches 63% of the temperature

difference.

Maximum permissible current

If the maximum permissible current flows to a

thermistor at 25

C, temperature of the thermistor

rises to 200

C, (160

C). When ambient temperature is

above 25

C, the maximum permissible current shall be

over reduced as the maximum permissible current

reduction curve.

Reliability tests

Dry heat test

MARK

Test sample is exposed in air at 200

C for  1,000

hours. 

R25/R25   

20%

Damp heat test

Test sample is exposed in atmosphere of 95%RH at

40

C for 1,000 hours. 

R25/R25   

10%

Load test

Test sample is applied the maximum rating current

in air at 25

C for 1,000 hours. 

R25/R25   

20%

Change of temperature

Test sample is given 10 times of the following

temperature cycle,

     

40

C for 30 minutes      room temperature for 5

minutes

     200

C for 30 minutes      room temperature for 5

minutes.

R25/R25   

10%

Residual resistance

If current is flowed through a thermistor, any heat

will be generated in the thermistor by which its

resistance will be decreased, however, a decrease

of a resistance will be stabilized at a saturation

resistance value which is determined by impressed

electric power and a dissipation constant. The

residual resistance value means maximum

saturation resistance value when the maximum

permissible current is flowed through the thermistor.

Temperature coefficient

The temperature coefficient of a thermistor is

expressed by the following equation ;

Dissipation factor

If small voltage is applied to a thermistor, small

current will flow which produce enough heat in the

thermistor. Dissipation factor is electric power

which make 1

C raise by heat in a thermistor.

Resistance-temperature characteristics

The theoretical characteristics of a thermistor is expressed by following equation.

P is applied electric power.

t is rised temperature of the thermistor.

New Power Thermistor MARK

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200

Ambient temperature (

C)

Current derating ratio

Power Thermistor

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

20

10

10 0

30 40 50 60 70 80 90 100 110 120 130 140 150 160

Ambient temperature (

C)

Temperature (

C)

Resistance change ratio

Current derating ratio

D TYPE

W TYPE

( % /

C)

T

2

B

exp  B

T

1

R

1

R

1

 is the zero-power resistance at absolute temperature T

1

R

2

 is the zero-power resistance at absolute temperature T

2

R

2

1

T

2

1

(mW/

C)

 

t

P

MARK

B : 3150K

Dry heat test

POWER THERMISTOR

Test sample is exposed in air at 160

C for 1,000

hours. 

R25/R25   

10%

Damp heat test

Test sample is exposed in atmosphere of 95%RH at

40

C for 1,000 hours. 

R25/R25   

10%

Load test

Test sample is applied the maximum rating current

in air at 25

C for 1,000 hours. 

R25/R25   

10%

Change of temperature

Test sample is given 10 times of the following

temperature cycle,

     

30

C for 30 minutes      room temperature for 5

minutes

     160

C for 30 minutes      room temperature for 5

minutes.

R25/R25   

10%

B is constant which depends on the material used to

make the thermistor. Unless otherwise specified, all

values of B are determined from measurements made

at 25

C and 85

C. 

200

0.01

0.1

1.0

10

100

160

100

50

25

25

0

Temperature (

C)

Resistance change ratio

MARK

B : 2900K

200

0.01

0.1

1.0

10

100

160

100

50

25

25

0

Temperature (

C)

Resistance change ratio

Power Thermistor

B : 3250K

0.02

0.03

0.05

0.1

0.2

0.3

0.5

1.0

2.0

3.0

5.0

10.0

20.0

160

100

50

25

30

0

23

Part number

Taping

Dimensions

5 D 11  T3C  (F2)

-

 Shape D : Disk type

Element diameter : 

11

 Resistance at 25

C : 5

 

 Washer type

4 W 25

-

 Shape W : Washer type

Element diameter : 

25

 Resistance at 25

C : 4

 

D

F

h

L

d

d

D

T

H

25 min.

T

5D-11

DU

 

0.8

Tin-plated

copper

wire

5D-11

DU

1. Straight lead type                     2. Forming lead type

W

W

0

W

1

W

2

L

H

1

P

P

1

P

O

D

0

t

1

t

h

F

1

28 max.

29 max.

(11)

23 max.

 

3

5

18

35 max.

(12)

Disk type

Disk type

Washer type

    

UL  approved         (Disk type)

   File  No. E92669

   Thermistor  type  device

    

Canadian  Standards          (Disk type)

   File  No. CA97673-1

   Class  7950  30  NTC  Thermistor 

Part No.

R

25

(

 

)

B value

B

25/85

(K)

Dissipation 

 factor

(mW/ 

C)

Specifications (Disk type)

Maximum

energy

J

(W s)

Maximum

rating

current

at 25

C

(A)

Residual

resistance

(

 

)

Thermal

time

constant

(s)

Rating

temp

(

C)

Maximum capacitance

(

F)

3D-22

4D-22

6D-22

4D-18

5D-18

8D-18

10D-18

5D-13

8D-13

16D-13

5D-11

8D-11

10D-11

10D-9

16D-9

22D-7

3

15%

4

15%

6

15%

4

15%

5

15%

8

15%

10

15%

5

15%

8

15%

16

15%

5

15%

8

15%

10

15%

10

15%

16

15%

22

15%

3250

5%

3250

5%

3250

5%

3250

5%

3250

5%

3250

5%

3250

5%

3250

5%

3250

5%

3250

5%

3250

5%

3250

5%

3250

5%

3250

5%

3250

5%

3250

5%

40.0

50.0

80.0

9.0

11.0

18.0

22.0

4.0

6.0

12.0

4.0

6.0

7.0

2.0

4.0

1.0

5.4

4.7

3.9

4.1

3.8

3.1

2.8

3.4

2.7

1.9

3.3

2.6

2.4

2.2

1.7

1.4

0.137

0.182

0.274

0.182

0.228

0.365

0.456

0.228

0.365

0.730

0.228

0.365

0.456

0.456

0.730

1.003

29.8

30.7

32.4

22.8

24.6

27.2

28.2

20.1

20.3

21.4

19.0

19.8

20.1

17.2

17.4

15.7

130

160

220

100

120

150

150

55

65

105

50

70

75

40

50

30

8,500

11,000

17,000

2,000

2,500

4,100

5,000

900

1,400

2,800

900

1,400

1,800

510

820

310

5,900

7,600

11,800

1,350

1,700

2,800

3,400

620

970

1,900

620

970

1,250

350

560

210

1,470

1,900

2,950

340

430

710

860

150

240

480

150

240

310

80

140

50

1,700

2,200

3,500

410

510

840

1,030

180

280

570

180

280

370

100

160

60

AC100V

AC120V

AC220V

AC240V

30

160

30

160

30

160

30

160

30

160

30

160

30

160

30

160

30

160

30

160

30

160

30

160

30

160

30

160

30

160

30

160

Taping

D-7

D-9

D-11

D-13

15

1

30

1

9

0.5

16

0.5

7.5

0.5 4

0.3

0

2

0.6

0.3

15

0.3 3.75

0.7 18

1.0

       

0.5

3max.

1.6max.

1max.

5min.

 P 

P

0

P

1

W  

W

0

W

1

W

2

H

1

L

F

1

D

0

t

t

1

h

D-7

D-9

D-11

D-13

D-18

D-22

9.5max.

11max.

14max.

16max.

21max.

25max.

8max.

9max.

8max.

13max.

15max.

18max.

20max.

26max.

30max.

15max.

17max.

20max.

22max.

28max.

32max.

3

0.2

6

1

3.5

0.5

7.5

1

10

1

5max.

6max.

D

T

H

h

F

L

d

AC100V

AC120V

AC220V

AC240V

Part No.

R

25

(

 

)

B value

B

25/85

(K)

Dissipation 

 factor

(mW/ 

C)

Specifications (Washer type)

Maximum

enegy

J

(W s)

Maximum

rating

current

at 25

C

(A)

Residual

resistance

(

 

)

Thermal

time

constant

(s)

Rating

temp

(

C)

Maximum capacitance

(

F)

*

4   Time  when  thermistor  temperature  reaches  63.2%  of  the  temperature  difference.  The  value  is  measured  in  the  air.

6W-22

4W-25

6.0

15%

3250

5%

3250

5%

4.0

15%

80

50

6.1

7.8

0.153

0.102

34.0

36.2

220

160

30

200

30

200

17,000

11,800

3,500

2,950

11,000

7,600

2,200

1,900

*

1

*

2

*

3

*

4

*

1   R

25

 : Rated  zero-power  resistance  value  at  25

C.

*

2   B  value : determined  by  rated  zero-power  resistance  at  25

C  and  85

C.

*

3   Residual  resistance  is  the  maximum  value  when  maximum  rating  current  is  applied.

Forming lead

Taping

*

1

*

2

*

3

*

4

Unit (mm)

Unit (mm)

Unit (mm)