MILPRF19500/553F
4.4.2.2 Quality level JAN, JANTX, and JANTXV (table EVIb of MILPRF19500).
Subgroup
Method
Conditions
B2
4066
IFSM = 600 A (pk); ten surges of tp = 8.3 ms each at 1 minute intervals;
IO = 22.5 A dc; VRM = 45 V (pk); 100°C < TC < 125°C; TJ ≤ 150°C.
TJ = 150°C minimum, VR = 36 V dc, IO = 0, t = 48 hours.
B3
1048
B5
4081
See 4.5.4.
4.4.3 Group C inspection. Group C inspection shall be conducted in accordance with the conditions specified for
subgroup testing in table EVII of MILPRF19500, and as follows. Electrical measurements (end-points) shall be
Subgroup
Method
Conditions
C2
2036
Test condition A, 10 lbs (4.54 Kg), t = 15 s.
Test condition F (method B), 5 pounds (2.27 Kg), t = 15 s.
Test condition D1, 10 ounce-inch (0.070 newton meter), t = 15 s.
Test condition D2, 15 pound-inch (1.69 newton meter), t = 15 s.
C5
4081
TJ = 150°C minimum, VR = 36 V dc, IO = 0.
C6
1048
Operational power cycling, IO = 20 A dc, TC (low) = 40°C +0, 15°C;
C6
1037
TC (high) = 115°C +5, 0°C; 6,000 cycles (may be continued from JANS group B,
subgroup 4); (see 4.5.6).
4.4.4 Group E inspection. Group E inspection shall be conducted in accordance with the conditions specified for
subgroup testing in appendix E, table EIX of MILPRF19500 and as specified in table II herein. Electrical
measurements (end-points) shall be in accordance with table I, subgroup 2 herein.
4.5 Methods of inspection. Methods of inspection shall be as specified in appropriate tables and as follows.
4.5.1 Pulse response measurements. The conditions for the pulse response measurements shall be as specified
in section 4 of MILSTD750.
4.5.2 Peak reverse energy test. The peak reverse energy test is to be performed as on figure 4. The Schottky
rectifier under test shall be capable of absorbing the reverse energy, as defined, and meet the electrical requirements
of subgroup 4 of table I herein.
4.5.3 Scope display evaluation. A curve trace visual display of the reverse characteristics (voltage versus current)
shall be made using a calibration of 10 mA for each division vertical sensitivity, and 10 V for each division horizontal
sensitivity. Increase the reverse voltage until the reverse current reaches 50 mA minimum to 70 mA maximum.
Observe the curve characteristics. Any device with an erratic pattern, such as double trace, other than capacitance
effects, intermittence, discontinuities other than zener noise at the knee of the curve, or shorts shall be removed from
the lot. Time limit for this test shall be 5 seconds minimum. This test shall be the last test performed on the device in
the 100 percent screening tests. The percent defective result for evaluation against the percent defective allowed
(PDA) shall be determined prior to the results of this test.
8
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business