MIL-PRF-19500/623D
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 Methods 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
* 4.5.2 Thermal resistance. Thermal resistance measurement 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.
b. Collector to emitter voltage magnitude shall be ≥ -10 V dc.
*
c. Reference temperature measuring point shall be the case.
d. Reference point temperature shall be +25°C ≤ TR ≤ +75°C and recorded before the test is started.
e. Mounting arrangement shall be with heat sink to header.
f. Maximum limit of RθJC shall be 1.5°C/W.
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