MIL-PRF-19500/117R
4.4.3 Group C inspection. Group C inspection shall be conducted in accordance with the conditions specified for
subgroup testing in appendix E, table E-VII of MIL-PRF-19500, and as follows. Electrical measurements (end-
points) shall be in accordance with table III herein.
Subgroup Method
Condition
0°C to +100°C, 10 cycles.
C2
1056
-55°C to +175°C, 20 cycles.
C2
1051
C2
2036
Tension: Test condition A; weight = 4 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.
C5
4081
See 4.3.2 herein.
IZ(min) = column 8 of table IV. Adjust IZ or TA to achieve TJ = 150°C minimum (see
C6
1027
4.5.6).
C7
Not applicable.
IZ = column 5 of table IV; T1 = +25°C ±5°C, T2 = +125°C ±5°C. (Maximum limit in
C8
4071
accordance with column 14 of table IV). Sample size = 22, c = 0. (See 4.5.4.)
4.4.4 Group E inspection. Group E inspection shall be conducted in accordance with appendix E, 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 III 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 = IZ1) (column 5 of table IV) 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.
4.5.2 Regulator voltage measurements. The test current shall be applied until thermal equilibrium is attained (90
seconds minimum) 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 +25°C +8°C, and -2°C. 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.
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 herein. Both tests shall be performed at thermal
equilibrium. This ΔVZ shall not exceed column 9 of table IV.
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