MIL-DTL-3965H
e.
Measurements after cycling: DC leakage, capacitance, and dissipation factor shall be measured as
specified in 4.7.5, 4.7.6, and 4.7.7, respectively. In addition, capacitors shall be externally examined for
leakage of electrolyte. Detection of leakage of electrolyte shall be determined by the use of thymol blue or
other suitable chemical indicator solution. Brackets shall be visually examined for mechanical damage.
4.7.11 Salt atmosphere (for qualification only) (see 3.15). Capacitors and brackets shall be tested in accordance
with method 101 of MIL-STD-202. The following details and exception shall apply:
a.
Applicable salt solution: 5 percent.
b.
Test condition: B (48 hours).
c.
Measurements after test: Not applicable.
d.
Examination after test: After the test, capacitors shall be washed, and then air dried for 24 hours. The
capacitors shall then be examined for evidence of harmful corrosion, loss of plating, unwrapping of or
mechanical damage to the insulating sleeving (when applicable), and legibility of marking. Brackets shall be
visually examined for evidence of harmful corrosion, loss of plating and obliteration of marking.
4.7.12 Solderability (capacitors with axial wire-lead terminals only, see 3.1) (see 3.16). Capacitors shall be tested
in accordance with method 208 of MIL-STD-202. The following details shall apply:
a.
Number of terminations of each part to be tested: 2.
b.
Depth of immersion: Terminals shall be immersed up to .062 inch (1.57 mm) of the welded joint or up to
.156 inch (3.96 mm) of the body whichever applies.
4.7.13 Terminal strength (see 3.17). All capacitors shall be tested in accordance with 4.7.13.1 and capacitors with
solder-lug terminals that show visible bending during this test shall be tested in accordance with 4.7.13.2. Capacitors
with screw-thread terminals shall be tested in accordance with 4.7.13.3, and capacitors with axial wire-lead terminals
shall be tested in accordance with 4.7.13.4. After the tests, the terminals, terminal weld or solder, and seals shall be
examined for loosening or permanent damage.
4.7.13.1 Pull test. Capacitors shall be tested in accordance with method 211 of MIL-STD-202. The following detail
and exceptions shall apply:
a.
Test condition: A.
b.
Applied force: 3 pounds +2, -0 ounces for capacitors with axial wire-lead terminals, and 5 pounds +3, -0
ounces for capacitors with solder-lug and screw thread terminals.
c.
Duration of applied force: 30 +5, -0 seconds.
4.7.13.2 Bend test. Capacitors shall be tested in accordance with method 211 of MIL-STD-202. The following
detail and exception shall apply:
a.
Test condition: B.
b.
Number of bends: 4.
4.7.13.3 Torque test. Capacitors shall be tested in accordance with method 211 of MIL-STD-202. The following
details shall apply:
a.
Test condition: E.
b.
Torque to be applied: 9 pound-inches for No. 6-32 screw-thread terminals, and 20 pound-inches for No. 1/2-
20 screw-thread terminals.
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