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DOD-C-29501 1986 Edition, June 9, 1986
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Includes all amendments and changes through Cancellation Notice 1, May 8, 1998
Additional Comments: CNCL NO S/S
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This specification covers the general requirements for double layer, carbon electrode nonsolid electrolytic, fixed capacitors, polarized and nonpolarized, nonhermetically sealed in metal and nonmetal cases. Capacitors covered by this specification may be used to provide a source of reserve energy to prevent erasure of memory-type circuits resulting from primary power interruptions.

Capacitors specified herein (see 3.1) shall be identified by a military part number which consists of the basic number of the specification followed by a series of coded characters. Each military specification sheet covers a different capacitor style. The coded number shall provide information concerning the capacitor's characteristic, working voltage, capacitance, and capacitance tolerance. CHART

The modification letter is used to indicate the latest characteristic of the part in the specification sheet. This letter shall be changed under the direction of the preparing activity.

The rated voltage for continuous operation from −40°C to +70°C is identified by a single letter as shown in table I. TABLE I. Voltage.
Symbol              Rated volts, dc     Surge volts, dc     

A- - - - -                  1.8                 2.2                                
B- - - - -                  5.5                 6.3                                 

The nominal capacitance value expressed in microfarads (μF) 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. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Space and Naval Warfare Systems Command, ATTN: SPAWAR 8111, Department of the Navy, Washington, DC 20363 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

The capacitance tolerance is identified by a single letter as shown in table II. TABLE II. Capacitance tolerance.
Symbol            Capacitance tolerance     

V- - - - -              −20, +80