MIL-PRF-19500/127W
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 herein. (ZJX applies to C2 and C6 only).
Subgroup
Method
Condition
0C to +100C, 10 cycles.
C2
1056
-55C to +175C, 25 cycles.
C2
1051
C2
2036
Tension: Test condition A; weight = 10 pounds, t = 15 seconds.
Lead fatigue: Test condition E. (Tension and lead fatigue are not required
for UR-1 suffix devices).
C2
1071
Test condition E.
C3
Not applicable.
See 4.3.2 herein.
C5
4081
C6
1027
IZ(min) = Column 8 of table IV minimum. Adjust IZM or TA to ensure a
TJ = 150C (minimum) (see 4.5.5).
C7
Not applicable.
IZ = 7.5 mA dc, T1 = +25C 5C, T2 = +125C 5C. (Max limit in accordance
C8
4071
with columns 13 and 14 of table IV). Sample size = 22, 0 rejects allowed.
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 table II herein. Electrical measurements (end-points) shall be
in accordance with the applicable inspections of 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 Surge current (IZSM). The peak currents shown in column 10 of table IV shall be applied in the reverse
direction and these shall be imposed on the current (IZ = 20 mA dc) a total of 5 surges at 1 minute intervals. Each
individual surge shall be one-half square-wave-pulse of one one-hundred twenty second duration or an equivalent
one-half sine wave with the same effective rms current. TA = +25C 5C.
4.5.2 Regulator voltage measurements. The test current shall be applied until thermal equilibrium is attained
(20 2 seconds) prior to reading the breakdown voltage. For this test, the diode shall be suspended by its leads
with mounting clips whose inside edge is located at .375 inch (9.53 mm) from the body (UR version = 0 lead
length) and the mounting clips shall be maintained at a temperature of +25C +8C, and -2C. This measurement
may be performed after a shorter time, following application of the test current, than that which provides thermal
equilibrium if correlation to stabilized readings can be established to the satisfaction of the Government. JANHC
and JANKC shall be pulse tested at 10 ms maximum.
4.5.3 Voltage regulation VZ (reg). Voltage regulation shall be determined by the difference of the regulator voltage
measured at different currents as specified in table I, subgroup 7. Both tests shall be performed at thermal
equilibrium. This VZ shall not exceed column 7 of table IV.
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