MIL-PRF-19500/279E
* 4.3 Screening (JANTX level). Screening shall be in accordance with table E-IV of MIL-PRF-19500 and as
specified herein. Specified electrical measurements shall be made in accordance with table I herein. Devices that
exceed the limits of table I herein shall not be acceptable.
Screening
(see table E-IV of
JANTX level
MIL-PRF-19500)
48 hours, TA = 175C
2
Required. Thigh = 175C minimum, ten continuous
3a
cycles, exposure time at temperature extremes
shall be 15 minutes minimum.
9
Not required
10
Not required
11
IR and VF, see 4.3.1
12
See 4.3.2
Subgroup 2 of table I herein; IR = 100 percent of
13
initial value or 250 nA dc, whichever is greater;
VF = 10 percent of initial reading.
* 4.3.1 Pre burn-in tests. The parameters VF and IR shall be measured and the data recorded for all devices in the
lot. All devices shall be handled or identified such that the delta end points can be determined after the burn-in test.
All devices which fail to meet these requirements shall be removed from the lot and the quantity removed shall be
noted on the lot history.
4.3.2 Burn-in test. Power burn-in conditions are as follows: Method 1038 of MIL-STD-750, condition B for 164
hours (minimum) under the following conditions: TA = 25C, VRWM = full rated (see 1.3); IO = 100 mA dc, f = 60 Hz.
Electrical measurements (end-points) shall be in accordance with screen 13, and table I, subgroup 2 herein.
4.3.3 Burn-in and life tests. These tests shall be conducted with a half-sine waveform of the specified peak
voltage impressed across the diode in the reverse direction followed by a half-sine waveform of the specified average
rectified current. The forward conduction angle of the rectified current shall be neither greater than 180 degrees, nor
less than 150 degrees
4.3.4 Burn-in test failure (screening). All devices that exceed the delta limits of screen 13 herein and the maximum
limits specified in table I subgroup 2 shall be removed from the inspection lot and the quantity removed shall be noted
on the lot history. Where the quantity removed after burn-in exceeds 10 percent of the total inspection lot on burn-in
test the lot may be resubmitted one time with a maximum PDA of 3 percent. A lot that fails the exceeds 20 percent
failure or 3 percent resubmission PDA on the intial burn-in, the entire lot shall be unacceptable as JAN product.
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 table E-V of MIL-PRF-19500,
and table I herein.
* 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 and JANTX) of MIL-PRF-19500. Electrical measurements (end-points) shall be
in accordance with table I, subgroup 2 herein.
4
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