MIL-PRF-19500/594B
4.4.2.2 Group B inspection, table E-VIb (JANTX and JANTXV of MIL-PRF-19500).
Subgroup
Method
Conditions
TC = +100°C; tp ≤ 8.3 ms; VR = rated VR (see 1.3); six 8.3 ms surges; 1
B2
4066
surge/minute maximum. IF (surge) = 50 A dc; IO = 10 A dc.
IF ≥ 0.5 A dc, IO (see 4.5.2); 2,000 cycles.
B3
1037
B4
Not applicable.
See 4.4.1 except tH ≥ 500 ms.
B5
3101
* 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) and delta requirements
shall be in accordance with the applicable steps of table III herein.
4.4.3.1 Group C inspection, table E-VII of MIL-PRF-19500.
Method
Conditions
Subgroup
C2
2036
Test condition A, weight = 10 pounds, t = 15 seconds.
C2
1021
Omit initial conditioning.
IF ≥ 0.5 A dc, IO (see 4.5.2); 6,000 cycles.
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. Electrical measurements (end-points) and delta requirements shall
be in accordance with the applicable steps and footnotes of table III herein, except ZθJX is not required.
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 DC intermittent operation life. A cycle shall consist of an "on" period, when forward current is applied
suddenly, not gradually, to the device for the time necessary to achieve an increase (delta) case temperature of
+85°C +15°C, -5°C followed by an "off" period, when the current is suddenly removed for cooling the case through a
similar delta temperature. Auxiliary (forced) cooling is permitted during the "off" period only. Either forward current or
"on" time, within specific limits, and "off" time may be adjusted to achieve the delta case temperature. Heat sinks
shall only be used if, and to the degree necessary, to maintain test samples with the desired delta temperature
tolerance. The heating time shall be such that 30 s ≤ theating ≤ 180 s. The forward current may be steady-state dc,
full-wave rectified dc, or the equivalent half-sine wave dc of the specified value. The test duration shall be the
specified number of cycles. Within the time interval of 50 cycles before, and 500 cycles after, the termination of the
test, the sample units shall be removed from the specified test conditions and allowed to reach room ambient
conditions. Specified end-point measurements for qualification and quality conformance inspections shall be
completed within 96 hours after removal of sample units from the specified test conditions. Additional readings may
be taken at the discretion of the manufacturer.
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