MIL-PRF-19500/177H
4.3.1 Power burn-in conditions. Power burn-in conditions are as follows: VCB = 10 - 30 V dc. Power shall be
applied to achieve TJ = +135°C minimum using a minimum PD = 75 percent of PT maximum rated as defined in 1.3.
With approval of the qualifying activity and preparing activity, alternate burn-in criteria (hours, bias conditions, TJ, and
mounting conditions) may be used for JANTX quality level. A justification demonstrating equivalence is required. In
addition, the manufacturing site's burn-in data and performance history will be essential criteria for burn-in
modification approval. Use method 3100 of MIL-STD-750 to measure TJ.
4.3.2 Thermal impedance. The thermal impedance measurements shall be performed in accordance with
method 3131 of MIL-STD-750 using the guidelines in that method for determining IM, IH, tH, and tSW (VC and VH
where appropriate). Measurement delay time (tMD) = 70 µs max. See table II, group E, subgroup 4 herein.
4.4 Conformance inspection. Conformance inspection shall be in accordance with MIL-PRF-19500 and as
specified herein.
4.4.1 Group A inspection. Group A inspection shall be conducted in accordance with MIL-PRF-19500 and table I
herein.
* 4.4.2 Group B inspection. Group B inspection shall be conducted in accordance with the tests and conditions
specified for subgroup testing in table E-VIb (JAN, JANTX, and JANTXV) of MIL-PRF-19500 and as follows.
Electrical measurements (end-points) shall be in accordance with table I, subgroup 2 herein.
Subgroup
Method
Condition
B3
1027
TA = room ambient as defined in the general requirements of MIL-STD-750,
VCB = 30 V dc; adjust PT to achieve TJ = 150°C min.
B3
2037
Test condition D.
TSTG(max) = +175°C
B6
1032
* 4.4.3 Group C inspection. Group C inspection shall be conducted in accordance with the test and conditions
specified for subgroup testing in table E-VII of MIL-PRF-19500 and as follows. Electrical measurements (end-points)
requirements shall be in accordance with table I, subgroup 2 herein.
Subgroup
Method
Condition
C2
2036
Test condition E
RθJX only, as applicable (see 1.3) and in accordance with thermal impedance curves.
*
C5
3131
C6
1026
TA = room ambient as defined in the general requirements of MIL-STD-750,
VCB = 30 V dc; adjust PT to achieve TJ = 150°C min.
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
MIL-STD-750.
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