MIL-DTL-3965H
TABLE VIII. Group B inspection.
Test
Requirement
Method
Sampling
(every 6 months)
paragraph
paragraph
procedure
Subgroup 1
Dielectric withstanding voltage
(Style CL55)
3.7.1
4.7.3.1
8 samples
Insulation resistance
0 failures
(Style CL55)
3.8
4.7.4.1
Subgroup 2
Stability at low and high
temperatures
3.21
4.7.17
8 samples
Thermal shock
3.14
4.7.10
0 failures
Subgroup 3
Life at +85°C (240 hours)
1/ 10 samples
3.22.2
4.7.18.2
1/ One failure allowed.
4.6.2 Qualification verification inspection. Qualification verification inspection shall consist of group C. Except
where the results of these inspections show noncompliance with the applicable requirements (see 4.6.2.1.4), delivery
of products which have passed groups A and B shall not be delayed pending the results of these qualification
verification inspections.
4.6.2.1 Group C inspection. Group C inspection is not required if the manufacturer is qualified to equivalent parts
for equivalent established reliability styles in MIL-PRF-39006. Group C inspection shall consist of the tests specified
in table IX in the order shown. Group C inspection shall be made on sample units which have passed group A
inspection, except that units which are to be subjected to tests of subgroup 5 shall be units which have successfully
passed subgroup 3 of table IX (see 4.6.1.3.3).
4.6.2.1.1 Sampling plan. Sample units shall be selected from the first lot and thereafter from every 6 months or
every 12 months production as specified in group C inspection table. The voltages selected shall be represented in
the sample in the same proportion as the voltages produced during the sampling period. The maximum and minimum
case sizes manufactured during the sampling period shall also be represented in the sample in at least the
approximate ratio of production.
4.6.2.1.2 Failures. If the number of failures exceeds the number allowed in the group C inspection table IX, the
sample shall be considered to have failed.
4.6.2.1.3 Disposition of sample units. Sample units that have been subjected to group C inspection shall not be
delivered on the contract or purchase order.
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