MIL-PRF-19500/407E
* 4.3.2 Thermal impedance measurements). 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, tMD, (and
VC where appropriate). Measurement delay time (tMD) = 70 µs max. See table III, 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 table I, subgroup 2.
* 4.4.2 Group B inspection. Group B inspection shall be conducted in accordance with the 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. Delta requirements shall be in
accordance with the applicable steps of table II herein.
Method
Conditions
Subgroup
TJ = +187.5°C ±12.5°C, VCB = 10 - 30 V dc.
B3
1027
TA = +200°C.
B6
1032
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 and as follows. Electrical measurements (end-points) shall be in
accordance with table I, subgroup 2. Delta requirements shall be in accordance with the applicable steps of table II
herein.
Method
Conditions
Subgroup
C2
1056
Test condition B.
C2
2036
Test condition A, weight = 10 lbs, application time = 15 seconds.
See 4.3.2, R θJC = 1.5 °C/W.
*
C5
3131
VCB = 10 - 30 V dc, TJ = +187.5°C ±12.5°C
C6
1026
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 III herein. Electrical measurements (end-
points) shall be in accordance with table I, subgroup 2. Delta requirements shall be in accordance with the applicable
steps of table II 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.
4.5.2 Coil selection for safe operating area (SOA) tests. In selecting coils for use in the clamped and unclamped
inductive SOA tests, prime consideration should be given to the recommended commercially available coil. However,
due to the extreme critical nature of the coil in these circuits and the wide tolerance of some commercially available
coils (+100 percent, -50 percent), it shall be the semiconductor manufacturer's responsibility to prove upon request,
compliance or equivalency of any coil used (commercial or in plant designed) to be within (+20 percent, -10 percent)
of the specified inductance at the rated current and dc resistance.
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