IOR 8AF User Manual
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PRESSFIT RECTIFIER DIODES
Features and Descriptions
Convenient pressfit package
Available with and without leads
High surge capabilities
Bulletin I20262 Rev.A 06/03
8AF SERIES
50 A
Application
Welders, Battery charges, Alternators
Major Ratings and Characteristics
Parameters 8AF Units
I
F(AV)
@ T
C
I
F(RMS)
I
@ 50Hz 714 A
FSM
@ 60Hz 747 A
I2t @ 50Hz 2546 A2s
@ 60Hz 2324 A2s
2
I
√t 25455 A2√s
V
range 100 to 800 V
RRM
T
J
50 A
150 °C
79 A
- 65 to 195
o
C
IR Case Style B-47
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8AF Series
Bulletin I20262 Rev.A 06/03
ELECTRICAL SPECIFICATIONS
Voltage Ratings
Voltage V
Type number Code peak reverse voltage repetitive peak rev. voltage @ T
1 100 150 5
8AF
2 200 300 5
4 400 500 5
8 800 900 5
Forward Conduction
Parameter 8A F Units Conditions
I
Maximum average forward current 50 A 180° conduction, half sine wave
F(AV)
@ Case temperature 150 °C
Maximum RMS forward current 79 A
I
F(RMS)
Maximum peak, one-cycle forward, 714 A t = 10ms No voltage
I
FSM
non-repetitive surge current 747 t = 8.3ms reapplied
2
I
t Maximum I2t for fusing 2546 A2s t = 10ms No voltage Initial TJ = TJ max.
2
√t Maximum I2√t for fusing 25455 A2√s t = 0.1 to 10ms, no voltage reapplied
I
Low level value of threshold voltage 0.60 V (16.7% x π x I
V
F(TO)1
V
High level value of threshold voltage 0.68 (π x I
F(TO)2
r
Low level value of forward slope resistance 6.66 mΩ (16.7% x π x I
f1
High level value of forward slope resistance 6.25 (π x I
r
f2
Maximum forward voltage drop 1.45 V TJ = 25°C, I
V
FM
, maximum repetitive V
RRM
VVmA
600 t = 10ms 100% V
628 t = 8.3ms reapplied Sinusoidal half wave,
2324 t = 8.3ms reapplied
1800 t = 10ms 100% V
1643 t = 8.3ms reapplied
, maximum non- I
RSM
RRM
RRM
< I < π x I
F(AV)
< I < 20 x π x I
F(AV)
< I < π x I
F(AV)
< I < 20 x π x I
F(AV)
= π x rated I
FM
F(AV)
), TJ = TJ max.
F(AV)
F(AV)
), TJ = TJ max.
F(AV)
F(AV)
), TJ = TJ max.
), TJ = TJ max.
RRM
= 150°C
J
max.
Thermal and Mechanical Specifications
Parameter 8AF Units Conditions
TJMax. junction operating temperature range - 65 to 195 °C
T
Storage temperature range - 65 to 195
stg
Max. thermal resistance, junction to case 0.60 K/W DC operation
R
thJC
R
Typical thermal resistance, case to heatsink 0.50 As per mounting details
thCS
wt Approximate weight 10 (0.36) g (oz)
Case style B-47 See outline table
MOUNTING: A 12.6 ± 0.02mm (0.496 to 0.497 inch) diameter hole should be drilled in heatsink, the leading edge chamfered to 0.038mm (0.015
inch) x 45°. The diode should then be press fitted, ensuring that the sides of the diode are kept parallel to the sides of the hole.
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