STANDARD RECOVERY DIODES
Stud Version
70/300U(R) SERIES
250A
300A
Bulletin I2039
Features
Alloy diode
Peak reverse voltage up to 1000V
Popular series for rough service
Standard JEDEC types
Stud cathode and stud anode version
Typical Applications
Welders
Power supplies
Motor controls
Battery chargers
General industrial current rectification
I
F(AV)
250
300
A
@ T
C
150
130
°C
I
FSM
@
50Hz
6550
A
@ 60Hz
6850
A
I
2
t
@
50Hz
214
KA
2
s
@ 60Hz
195
KA
2
s
V
RRM
range
100 to 1000
50 to 1000
V
T
J
-65 to 200
°C
Parameters
70U
300U
Units
Major Ratings and Characteristics
case style
DO-205AB (DO-9)
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70/300U(R) Series
Voltage
V
RRM
, maximum repetitive
V
RSM
, maximum non-
I
RRM
max.
Type number *
Code
peak reverse voltage
repetitive peak rev. voltage
T
J
= 200°C
V
V
mA
10
100
200
20
200
300
40
400
500
60
600
720
80
800
960
100
1000
1200
Voltage
V
RRM
, maximum repetitive
V
RSM
, maximum non-
I
RRM
max.
Type number
Code
peak reverse voltage
repetitive peak rev. voltage
T
J
= 175°C
V
V
mA
5
50
100
40
10
100
200
40
20
200
300
40
30
300
400
40
40
400
500
40
60
600
720
40
80
800
960
35
100
1000
1200
30
ELECTRICAL SPECIFICATIONS
Voltage Ratings
70U
60
300U
I
F(AV)
Max. average forward current
250
300
A
180° conduction, half sine wave
@ Case temperature
150
130
°C
I
FSM
Max. peak, one-cycle forward,
6550
t = 10ms
No voltage
non-repetitive surge current
6850
t = 8.3ms
reapplied
5500
t = 10ms
100% V
RRM
5750
t = 8.3ms
reapplied
Sinusoidal half wave,
I
2
t
Maximum I
2
t for fusing
214
t = 10ms
No voltage
Initial T
J
= T
J
max.
195
t = 8.3ms
reapplied
151
t = 10ms
100% V
RRM
138
t = 8.3ms
reapplied
I
2
√
t
Maximum I
2
√
t for fusing
2140
KA
2
√
s
t = 0.1 to 10ms, no voltage reapplied
V
F(TO)
Max. value of threshold
voltage
r
f
Max. value of forward slope
resistance
V
FM
Max. peak forward voltage
Parameter
70U
300U
Units
Conditions
Forward Conduction
KA
2
s
A
0.610
V
0.751
m
Ω
T
J
= 200°C
--
1.40
V
(I
FM
x
π
x I
F(AV)
(942A peak), T
J
= 25°C
1.30
--
V
(I
FM
x
π
x I
F(AV)
(785A peak), T
J
= 25°C
* Also available as JEDEC series: 1N3735 through 1N3743; 1N2054 through 1N2068; 1N4044 through 1N4056.
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70/300U(R) Series
Fig. 3 - Forward Power Loss Characteristics
Fig. 4 - Forward Power Loss Characteristics
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70/300U(R) Series
Fig. 7 - Forward Voltage Drop Characteristics
Fig. 8 - Thermal Impedance Z
thJC
Characteristic
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70/300U(R) Series
T
J
Max. junction operating temperature range
-65 to 200
T
stg
Max. storage temperature range
-65 to 200
R
thJC
Max. thermal resistance, junction to case
0.18
DC operation
R
thCS
Max. thermal resistance, case to heatsink
0.08
Mounting surface, smooth, flat and greased
T
Max. allowed mounting torque +0 -20%
37
Not lubricated threads
28
Lubricated threads
wt
Approximate weight
250
g
Case style
DO-205AB (DO-9)**
JEDEC (See Outline Table)
Parameter
70/300U(R)
Units
Conditions
Thermal and Mechanical Specifications
°C
K/W
Nm
** 302U-A uses IR case style B-26
180°
0.020
0.015
T
J
= T
J
max.
120°
0.024
0.025
90°
0.031
0.034
60°
0.045
0.047
30°
0.077
0.077
Conduction angle
Sinusoidal conduction
Rectangular conduction Units
Conditions
K/W
Ordering Information Table
300
U
R
100
A
1
2
3
4
5
6
Device Code
1
-
300
= Standard 300U device
70
= Standard 70U device
302
= 300U Top Threaded version
72
= 70U with Pinch Bolt
2
-
U
= Essential Part Number
3
-
F
= Flat Base, available only on 72UF Series
None = Normal Stud
4
-
R
= Stud Reverse Polarity (Anode to Stud)
None = Stud Normal Polarity (Cathode to Stud)
5
-
Voltage code: Code x 10 = V
RRM
(See Voltage Ratings table)
6
-
A
= Essential Part Number only for 300U Series
None = 70U Series
NOTE: For longer lead Contact Factory
∆
R
thJC
Conduction
(The following table shows the increment of thermal resistence R
thJC
when devices operate at different conduction angles than DC)
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70/300U(R) Series
Outline Table
70U/300U-A Series
Conforms to JEDEC DO-205AB (DO-9)
All dimensions in millimeters (inches)
302U-A Series
IR Case Style B26
All dimensions in millimeters (inches)
1
3
4
.6
(
5
.3
0
)
19.18 (0.755)
MAX.
3/4"-16UNF-2A*
19.02 (0.749)
DIA. MAX.
* METRIC DEVICE. M16 X 1.5 FOR 300U..AM
METRIC DEVICE. M20 X 1.5 FOR 300U..AMA
2
8
.4
5
(
1
.1
2
)
M
A
X
.
1
4
9
.9
(
5
.9
0
)
8.89 (0.350)
8.38 (0.330)
DIA.
11.51 (0.453)
10.74 (0.423)
5
3
.3
4
(
2
.1
0
)
M
A
X
.
27.94 (1.10)
DIA. MAX.
31.75 (1.250)
30.94 (1.218)
ACROSS FLATS
2
1
.0
3
(
0
.8
3
)
2
0
.1
4
(
0
.7
9
)
3.18 (0.125)
MAX.
UNTHREADED
PORTION
9.27 (0.365)
7.87 (0.310)
4.32 (0.170) MAX.
13.46 (0.530)
11.94 (0.470)
2
8
.4
5
(
1
.1
2
)
M
A
X
.
27.94 (1.10) DIA. MAX.
3/4"-16UNF-2A
19.02 (0.749)
DIA. MAX.
9
.2
7
(
0
.3
6
5
)
7
.8
7
(
0
.3
1
0
)
31.75 (1.250)
30.94 (1.218)
ACROSS FLATS
1
6
.5
1
(
0
.6
5
)
1
4
.9
9
(
0
.5
9
)
ACROSS FLATS
18.29 (0.72)
16.76 (0.66)
9.50 (0.374) MAX. DIA.
3/8"-24UNF-2A
2
1
.0
3
(
0
.8
2
8
)
2
0
.1
4
(
0
.7
9
3
)
3.18 (0.125)
MAX.
5
8
.6
7
(
2
.3
1
)
5
5
.6
3
(
2
.1
9
)
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70/300U(R) Series
Outline Table
Pinch Bolt
43-8223
Spring Clamp
43-8222
70UF supplied with spring clamp
72UF supplied with pinch bolt and spring clamp
72UF Series
Flat Base
All dimensions in millimeters (inches)
Fig. 2 - Current Ratings Characteristics
Fig. 1 - Current Ratings Characteristics
11.19 (0.44) DIA.
1
2
(
0
.4
7
)
5
0
(
1
.9
7
)
M
A
X
.
2
8
.4
5
(
1
.1
2
)
M
A
X
.
36 (1.41) A/C
9
.2
7
(
0
.3
6
5
)
7
.8
7
(
0
.3
1
0
)
31.75 (1.250)
30.94 (1.218)
ACROSS FLAT
60 (2.36)
24
(0.94)
48 (1.88)
5
0
(
1
.9
6
)
7 (0.27)
2
7
.6
(
1
.0
8
)
D
IA
.
FULL RAD.
41 (1.61)
24
(0.94)
2.4
(0.09)
DIA. 11.25 (0.44)
1
3
(0
.5
1
)
9 (0.35) ±
0.1 (0.004)
DIA.
5.5 (0.21) DIA.
16
(0.62)
33 (1.29)
6
(0.23)
2
0
(0
.7
8
)
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