MIL-PRF-19500/461F
* 4.3.3 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, tSW, (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. Electrical measurements (end-points) shall be in accordance with the inspections of table I, subgroup 2
herein.
4.4.2 Group B inspection. Group B inspection shall be conducted in accordance with the conditions specified for
subgroup testing in table E-VIA (JANS) and table E-VIB (JAN, JANTX, and JANTXV) of MIL-PRF-19500. Electrical
measurements (end-points) shall be in accordance with the inspections of table I, subgroup 2 herein.
4.4.2.1 Group B inspection, table E-VIA (JANS) of MIL-PRF-19500.
Subgroup Method
Conditions
VCB ≥ 10 V dc, forced air cooling on the devices shall be permitted only during the toff
B4
1037
time.
VCE ≥ 10 V dc, TA ≤ +125°C, adjust TA and power to achieve a TJ ≥ +275°C, t = 96
B5
1027
hours. PT = 3 W minimum.
4.4.2.2 Group B inspection, table E-VIB (JAN, JANTX, and JANTXV) of MIL-PRF-19500.
Subgroup Method
Conditions
VCB ≥ 10 V dc, forced air cooling on the devices shall be permitted only during the toff
B3
1037
time.
*
B5
Not applicable.
* 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
the inspections of table I, subgroup 2 herein.
Method
Conditions
Subgroup
C2
2036
Test condition A, weight = 10 pounds, t = 15 seconds.
Thermal impedance, see 4.3.3, RθJC(max) = 5°C/W.
*
C5
3131
VCB ≥ 10 V dc, forced air cooling on the devices shall be permitted only during the
C6
1037
toff time.
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 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 measurements shall be as specified in section 4 of
MIL-STD-750.
6
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