MIL-PRF-19500/621D
4.4.3 Group C inspection. Group C inspection shall be conducted in accordance with the conditions specified for
subgroup testing in table E-VII of MIL-PRF-19500. Electrical measurements (end-points) shall be in accordance with
table I, subgroup 2 herein.
Subgroup
Method
Conditions
C2
1056
Test condition B.
C2
2036
Test condition A, weight = 4.5 kg, t = 10 seconds.
VCB ≥ -10 V dc.
C6
1037
*
4.4.4 Group E inspection. Group E inspection shall be conducted in accordance with the conditions specified for
subgroup testing in table E-IX of MIL-PRF-19500 and as specified in table II herein. Electrical measurements (end-
points) shall be in accordance with table I, subgroup 2 herein.
4.5 Method of inspection. Methods of inspection shall be as specified in the appropriate tables and as follows:
4.5.1 Pulse measurements. Conditions for pulse measurement shall be as specified in section 4 of MIL-STD-
750.
4.5.2 Thermal resistance. Thermal resistance measurements shall be conducted in accordance with test method
3131 of
MIL-STD-750. The following details shall apply:
a.
Collector current magnitude during power application shall be -1.0 A dc.
Collector to emitter voltage magnitude shall be ≥ -10 V dc.
b.
c.
Reference temperature measuring point shall be the case.
Reference point temperature shall be 25°C ≤ TR ≤ 75°C and recorded before the test is started.
d.
e.
Mounting arrangement shall be with heat sink to header.
Maximum limit of RθJC shall be 1.5°C/W.
f.
6
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