MIL-PRF-19500/348F
* 4.3.1 Power burn-in conditions. Power burn-in conditions are as follows: VCB = 10 - 30 V dc. Power shall be
applied to achieve TJ = +135°C minimum using a minimum PD = 75 percent of PT maximum rated as defined in 1.3.
With approval of the qualifying activity and preparing activity alternate burn-in criteria (hours, bias conditions, TJ and
mounting conditions) may be used. A justification demonstrating equivalence is required. In addition, the
manufacturing site's burn-in data and performance history will be essential criteria for burn-in modification approval.
* 4.3.2 Thermal impedance. See figures 4 and 5. The thermal impedance measurements shall be performed in
accordance with method 3131 of MIL-STD-750 using the guidelines in that method for determining IM, IH, tH, tMD,
and VCE. The thermal impedance limit shall comply with the thermal impedance graphs in figures 4 and 5 (less than
or equal to the curve value at the same tH time) and shall be less than the process determined statistical maximum
limit as outlined in method 3131 of MIL-STD-750. See Group E subgroup 4 herein.
* 4.4 Conformance inspection. Conformance inspection shall be in accordance with MIL-PRF-19500, and as
specified herein. If alternate screening is being performed in accordance with MIL-PRF-19500, a sample of screened
devices shall be submitted to and pass the requirements of subgroups 1 and 2, of table I herein, inspection only (table
VIb, group B, subgroup 1 is not required to be performed again if group B has already been satisfied in accordance
with 4.4.2).
4.4.1 Group A inspection. Group A inspection shall be conducted in accordance with MIL-PRF-19500, and table I
herein.
* 4.4.2 Group B inspection. Group B inspection shall be conducted in accordance with the tests and conditions
specified for subgroup testing in table VIa (JANS) of MIL-PRF-19500 and 4.4.2.1. Electrical measurements (end-
points) and delta requirements shall be in accordance with table I, subgroup 2 and 4.5.3 herein. See 4.4.2.2 for JAN,
JANTX, and JANTXV group B testing. Electrical measurements (end-points) and delta requirements for JAN, JANTX,
and JANTXV shall be after each step in 4.4.2.2 and shall be in accordance with table I, subgroup 2 and 4.5.3 herein.
* 4.4.2.1 Group B inspection, table VIa (JANS) of MIL-PRF-19500.
Subgroup
Method
Condition
B4
1037
VCB = 10 - 30 V dc.
VCB = 10 V dc; PD ≥ 100 percent of maximum rated PT (see 1.3). (NOTE: If a failure
B5
1027
occurs, resubmission shall be at the test conditions of the original sample.)
Option 1: 96 hours minimum sample size in accordance with MIL-PRF-19500, table VIa,
adjust TA or PD to achieve TJ = +275°C minimum.
Option 2: 216 hours minimum, sample size = 45, c = 0; adjusted TA or PD to achieve a
TJ = +225°C minimum.
RΘJA, RΘJC only (see 1.3).
B6
3131
6
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business