MIL-PRF-87164A
4.6.3.1.2 Subgroup 2. Subgroup 2 tests of Table V shall be performed on a sample selected in accordance with
table VI based on the size of the lot. In the event of one or more failures, the lot shall be rejected and not supplied to
this specification. The manufacturer has the option of 100 percent screening the lot for the quality characteristic
found defective in the sample and any defective unit removed. A new sample of parts shall then be randomly
selected in accordance with table VI. If one or more defects are found in the second sample, the lot shall be rejected
and shall not be supplied to this specification.
4.6.3.1.3 Subgroup 4 and subgroup 5. The number of sample units required by table V shall be performed on
sample units from lots that have been subjected to and have passed subgroup 1 and subgroup 2 tests.
TABLE V. Group A inspection.
Inspection
Requirement
Method
Sampling
Paragraph
Paragraph
Procedure
Subgroup 1
4.7.11.1
3.15
Thermal shock and immersion
4.7.7
3.11
High voltage stabilization
100 percent 2/ 3/
4.7.2
3.6
Dielectric withstanding voltage
4.7.4.1
3.8.1
Insulation resistance (+25 C)
4.7.5
3.9
Capacitance 1/
4.7.6
3.10
Dissipation factor
Subgroup 2
Visual and mechanical examination
3.1, 3.4 to 3.5.2 incl
4.7.1
see table VI
3.24 to 3.25 incl
Subgroup 3
Insulation resistance at +25°C and +125°C
3.8
4.7.4
20 samples
0 failures
Moisture resistance
3.18
4.7.14
20 samples
1 failure
Subgroup 4
Life test (250 hours accelerated)
3.19
4.7.15.2.1
20 samples
0 failures
Subgroup 5 4/
Resistance to solvents
3.21
4.7.17
5 samples
0 failures
Solderability 5/
3.12
4.7.8
10 samples
1 failure
1/ Capacitance values outside the initial limits by 1 percent or 1 pF, whichever is greater, shall be used for PDA
lot rejection.
2/ Dissipation factor greater than 130 percent of the initial limit shall be used for PDA lot rejection.
3/ All capacitors delivered to this specification shall meet the nominal requirements.
4/ The same samples can be used for resistance to solvents and solderability.
5/ The manufacturer may request the deletion of the subgroup 5 solderability test, provided an in-line or
process control system for assessing and assuring the solderability of leads can be validated and approved
by the qualifying activity. Deletion of the test does not relieve the manufacturer from meeting this test
requirement in case of dispute. If the design, material, construction, or processing of the part is changed, or
if there are any quality problems, the qualifying activity may require resumption of the test.
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