MIL-PRF-19500/478K
* 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
Subgroup
Method
Condition
C2
2036
Terminal strength: Test condition A; weight = 10 pounds; t = 15 s.
Bending stress: Test condition F, method B; weight = 3 pounds; t = 15 s.
Lead torque: Test condition D1; torque = 10 ounce-inches; t = 15 s.
Stud torque: Test condition D2; torque = 10 pound-inches; t = 15 s.
RθJC = 1.5°C/W; tH ≥ 20 seconds; heating current (IH) ≥ rated IO;
*
C5
4081 or
tMD ≤ 250 µs; measurement current 10 mA ≤ IM ≤ 100 mA.
3101
C6
1036
C6
1038
Condition A, t = 1000 hours, TJ = +175°C, VR = 80 percent of VRWM (pk)
(see 1.3), JAN, JANTX and JANTXV only.
* 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 and the applicable step of table III 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 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. Forward current and
"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 within 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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