MIL-PRF-49137E
TABLE III. Qualification inspection.
Test
Number of
Number of
Requirement
method
sample units to
failures
Inspection
paragraph
paragraph
be inspected
allowed
Group I
Voltage aging
Construction analysis
(metal cased units only)
154
DC leakage
0
or
Capacitance
1/ 160
Dissipation factor
Visual and mechanical
inspection
and 3.23
Group II
Shock (specified pulse)
12
(polarized capacitors only)
Vibration, high frequency
Thermal shock
Group III
Resistance to soldering heat
18
1
Terminal strength
Moisture resistance
Group IV
Stability at low and high
12
temperatures
Surge voltage
Group V
102
1
Life (1,000 hours at +85° C)
Group VI
Solderability
10
1
Resistance to solvents
1/ For metal cased units.
4.6.1.2 Prescreen inspection. All capacitors submitted for group A inspection shall be 100 percent prescreened for
the inspections specified in table IV, in the order shown.
TABLE IV. Prescreen inspection.
Requirement
Test method
Inspection
paragraph
paragraph
Voltage aging
DC leakage
Capacitance
Dissipation factor
9
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