MIL-PRF-81F
3.16 Vibration, high frequency. When capacitors are tested as specified in 4.6.13, there shall be no intermittent
contacts of 0.5 ms or greater duration or arcing or other indication of breakdown, nor shall there be any open or short
circuiting or evidence of mechanical damage. Capacitors shall also meet the following requirements.
Capacitance: Change not more than 2 percent of 0.5 pF (0.25 pF for values less than 10 pF), whichever is
greater, from the initial value obtained when measured as specified in 4.6.5.
Dissipation factor: Not more than 0.2 percent.
Dielectric withstanding voltage: As specified in 3.5.
3.17 Moisture resistance. When measured as specified in 4.6.14, capacitors shall meet the following
requirements.
Visual inspection: There shall be no mechanical damage.
Insulation resistance: Shall exceed 10,000 megohms.
Capacitance: Change not more than 10 percent for style CV11, and not more than 5 percent for style CV31
from the initial value obtained when set and measured as specified in 4.6.5.
Dissipation factor: Shall not be more than 0.5 percent.
3.18 Marking. Each capacitor shall be legibly marked with smear-resistant ink that will withstand the
environmental tests specified herein and shall be marked with the type designation, and the manufacturer's name or
symbol. The marking shall not be placed on the mounting surface. There shall be no space between the symbols
which comprise the type designation. If lack of space requires it, the type designation may appear on two lines. In
this event, the type designation shall be divided between the style and the characteristic symbols and shall appear
on two lines as shown in the following example.
CV11
A070
Other markings which in any way interfere with, obscure, or confuse those specified herein, are prohibited. Marking
shall remain legible after all tests.
3.19 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the
operational and maintenance requirements, and promotes economically advantageous life cycle costs.
3.20 Workmanship. Capacitors shall be manufactured and processed in such a manner as to be uniform in
quality and be free from other defects that will affect life, serviceability, or appearance.
3.20.1 Soldering. All excess flux or solder shall be removed. Electrical connections shall be electrically
continuous after soldering.
3.20.2 Finish of terminals. The terminals shall be so coated that soldering can be accomplished readily.
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