NPFC - MIL-C-18312
CAPACITORS, FIXED, METALLIZED (PAPER-PLASTIC, OR PLASTIC FILM) DIELECTRIC, DIRECT CURRENT (HERMETICALLY SEALED IN METAL CASES), GENERAL SPECIFICATION FOR
| Organization: | NPFC |
| Publication Date: | 8 January 1970 |
| Status: | inactive |
| Page Count: | 21 |
scope:
This specification covers the general requirements for fixed capacitors with metallized (paper, paper-plastic or plastic film) dielectric, direct current, hermetically sealed in metal cases. These capacitors should only be used in circuitry in which high values of insulation resistance are not essential, and in which occasional momentary breakdowns can be tolerated.
The type designation shall be in the following form, and as specified (see 3.1):
The style is identified by the two-letter symbol "CH" followed by a two-digit number; the letters identify metallized (paper or plastic film) dielectric, fixed capacitors, and the number identifies the shape of the capacitor.
The terminal is identified by a single letter as shown in table I. TABLE I. Terminal.
Symbol Description
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The circuit diagram (and the number of terminals associated with each diagram) is identified by a single number as shown in table II.
The characteristic is identified by a single letter as shown in table III. TABLE III. Characteristic.
Symbol Operating temperature range
(±3°C)
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The dc voltage rating is identified by a single letter as shown in table IV. For recommended ac ratings, see 6.8. TABLE IV. DC voltage rating.
Symbol DC voltage rating
(Volts)
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The nominal capacitance value expressed in picofarads (pF) is identified by a three-digit number; the first two digits represent significant figures and the last digit specifies the number of zeros to follow.
The capacitance tolerance is identified by a single letter as shown in table V. TABLE V. Capacitance tolerance.
Symbol Tolerance
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