MIL-DTL-3965H
3.5.1 Case. Each capacitor shall be enclosed in a hermetically sealed metal case, which will prevent leakage or
evaporation of the electrolyte and, in addition, will protect the capacitor element against the entry of contaminants.
3.5.1.1 Sleeving (insulated styles only, (see 3.1). The sleeving shall extend .016 inch (0.41 mm) minimum, .062
inch (1.57 mm) maximum, beyond each end of the capacitor body; however, if a shrink fitted insulation is used for the
sleeving, it shall lap over the ends of the capacitor body.
3.5.2 Terminals.
3.5.2.1 Solder dip (retinning). Only the manufacturer (or his authorized category B distributor) may solder dip/retin
the leads of the capacitors supplied to this specification, provided the solder dip process (see appendix C) has been
approved by the qualifying activity.
3.5.3 Tin plated finishes. Tin plating is prohibited as a final finish or as an undercoat. Tin-lead (Sn-Pb) finishes
are acceptable provided that the minimum lead content is 3 percent (see 6.7).
3.6 Seal When capacitors are tested as specified in 4.7.2, there shall be no evidence of leakage.
3.7 Dielectric withstanding voltage (style CL55 and insulated styles only, see 3.1).
3.7.1 Style CL55. When capacitors are tested as specified in 4.7.3.1, there shall be no indication of damage or
breakdown.
3.7.2 Insulated styles (see 3.1). When capacitors are tested as specified in 4.7.3.2, the sleeving shall withstand
the specified potential without breakdown.
3.8 Insulation resistance (style CL55 and insulated styles only, see 3.1). When measured as specified in 4.7.4.1
or 4.7.4.2, the insulation resistance shall be not less than 100 megohms.
3.9 DC leakage. When measured as specified in 4.7.5, the dc leakage shall not exceed the applicable value
specified (see 3.1).
3.10 Capacitance. When measured as specified in 4.7.6, the capacitance shall be within tolerance of the nominal
value specified (see 3.1).
3.11 Dissipation factor. When determined as specified in 4.7.7, the dissipation factor shall not exceed the
applicable percent specified (see 3.1).
3.12 Shock (specified pulse). When capacitors and brackets are tested as specified in 4.7.8, the capacitors shall
exhibit no intermittent contacts of 0.5 millisecond or greater duration, or arcing or any open-circuiting or
short-circuiting, mechanical damage, or leakage of electrolyte. The brackets shall exhibit no mechanical damage.
3.13 Vibration, high frequency. When capacitors and brackets are tested as specified in 4.7.9, the capacitors shall
exhibit no intermittent contacts of 0.5 ms or greater duration, open-circuiting or short-circuiting, mechanical damage,
or leakage of electrolyte. The brackets shall exhibit no mechanical damage.
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