MIL-PRF-19500/477K
* TABLE II. Group E inspection (all quality levels) for qualification and requalification only.
Inspection
MIL-STD-750
Sampling
plan
Method
Conditions
Subgroup 1
45 devices
c=0
Thermal shock (liquid to
1056
20 cycles, except low temperature shall be achieved using
liquid)
liquid nitrogen (-195°C). Perform a visual for cracked
glass.
-65°C to +175°C, 500 cycles.
Temperature cycling (air
1051
to air)
Hermetic seal 1/
1071
Electrical measurement
Subgroup 2
22 devices
c=0
t = 1,000 hours; TA = +150°C; VR dc = 80 - 85 percent rated
Steady-state dc blocking
1048
life
Electrical measurement
performed, and table III, steps 1 and 2 herein. For
irradiated devices, include trr as an end-point
measurement.
Sample size
Subgroup 4
N/A
Thermal impedance
See MIL-PRF-19500.
curves
Subgroup 5
Not applicable
18
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