MIL-DTL-917F(SH)
Table XIX. Application stress limits and derating factor for rectifiers, SCRs 1/, GTOs 1/, bipolar transistors, and
IGBTs 2/.
Stress factor limit in
relation to rating factor
Rating factor
Stress factor
Lower
Upper
Rectifiers
Working peak reverse voltage
---
0.5 VRRM
Repetitive peak reverse voltage
Non-repetitive peak reverse voltage
---
0.7 VRSM
Non-repetitive peak reverse voltage
DC reverse blocking voltage
---
0.4 VRRM
Repetitive peak reverse voltage
Average current
---
0.5 IF(AV)
Half-cycle forward current average
Peak surge current
---
0.7 ITSM
Peak surge current
Junction temperature
---
0.8 Tj(max)
Maximum operating junction
temperature
SCRs
Working peak reverse voltage
---
0.5 VRRM
Repetitive peak reverse voltage
Non-repetitive peak reverse voltage
---
0.7 VRSM
Non-repetitive peak reverse voltage
DC reverse blocking voltage
---
0.4 VRRM
Repetitive peak reverse voltage
Working peak forward voltage
---
0.5 VDRM
Repetitive peak off-state voltage
Non-repetitive peak forward voltage
---
0.7 VDRM
Non-repetitive off-state voltage
Peak surge current
---
0.7 ITSM
Surge on-state current
Average current
---
0.5 IT(AV)
Half-cycle forward current average
Pulsed gate current for
2.0
10.0 IGT
Gate trigger firing current
Peak reverse gate voltage
---
0.5 VGRM
Maximum reverse gate voltage
Maximum rate of current rise during turn-
---
0.5 di/dt
Maximum rate-of-rise on state current
on
Maximum rate-of-rise forward blocking
---
0.5 dv/dt
Maximum allowable rate-of-rise,
voltage
forward blocking voltage (static)
Turn-off time
---
0.5 tq
Circuit commutated turn-off time
Junction temperature
---
0.8 Tj(max)
Maximum operating junction
temperature
GTOs
DC blocking voltage
---
0.4 VDRM
Repetitive peak voltage
Nominal working peak reverse voltage
---
0.5 VRRM
Repetitive peak reverse voltage
Repetitive peak reverse voltage
---
0.7 VRRM
Repetitive peak reverse voltage
Non-repetitive peak reverse voltage
---
1.0 VRRM
Non-repetitive peak reverse voltage
Non-repetitive peak forward blocking
---
0.8 VDRM
Non-repetitive peak off-state voltage
voltage
Maximum rate-of-rise of forward blocking
---
0.5 dv/dt
Critical rate-of-rise of forward
voltage
(critical)
blocking voltage
Rate-of-rise of reapplied forward blocking
---
0.7 dv/dt
Reapplied rate-of-rise of forward
voltage
(reapplied)
blocking voltage
Minimum duration of gate turn-off signal
2.0
---tgq
Gate controlled turn-off time
(Gain = 4), Tj = Tj(max)
47
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