MIL-PRF-55365H
4.6.1.2.3.2 Weibull. Subgroup 1 tests shall be performed on an inspection lot basis (see 4.6.1.1.2) on 100 percent
of the product supplied under this specification. Requirements for the infant mortality period and Weibull FRL grading
shall be in accordance with 4.7.20.
4.6.1.2.3.3 Subgroup 1a tests (for "T" level only). Subgroup 1a test (for "T" level only) Radiographic inspection is
performed on 100% of the T level product supplied under this specification. Capacitors failing this inspection shall be
removed from the lot. Destructive physical analysis shall be performed on an inspection lot. If a lot is rejected on the
DPA sample, the manufacturer has the option to convert the lot to standard product (Product level designators A, B,
C, D, M, P, R, or S) if the DPA defect is not considered a reliability risk.
*
TABLE VIII. Group A inspection for Weibull distribution.
Inspection
Requirement
Test method
Sampling procedure
paragraph
paragraph
Subgroup 1
Reflow conditioning
Thermal shock (unmounted)
100% inspection
Surge current option C (when specified in PIN)
Weibull FRL grading
Surge current options A or B (when specified in PIN)
Subgroup 1a
100%
Radiographic inspection (T level only)
5 samples
Destructive physical analysis (T level only)
0 failures
Subgroup 2
Mechanical examination
(physical dimensions only) 1/
See table IX
Subgroup 3
Visual examination
(T level 100%)
Materials
13 samples
Marking
0 failures
Workmanship
Subgroup 4
Stability at low and high temperatures 2/
13 samples
0 failures
Subgroup 5
Solderability 3/
13 samples
0 failures
1/ This can be eliminated if the manufacturer has demonstrated process control under the SPC program (see 3.3.1),
and has been approved by the qualifying activity. If the design, material, construction, or processing of the part is
changed or, there are any quality problems, or failures, the qualifying activity may require resumption of the
specified testing. Deletion of testing does not relieve the manufacturer from meeting the test requirement in case
of dispute.
2/ Sampling need only conform to the requirements of 4.6.1.1.1 (exponential distribution) inspection lot.
3/ Not applicable to gold plated termination finishes.
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