scope:

This specification covers the general requirements for polarized, dry-electrolyte, aluminum, direct current (dc), fixed capacitors for use in filter and bypass circuits where large excesses of capacitance over the nominal capacitance 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 "CE" followed by a two-digit number. The letters identify polarized, dry-electrolyte, aluminum, dc, fixed capacitors. The number identifies the shape and dimension of the capacitor.

The characteristic is identified by a single letter in accordance with table I. TABLE I. Characteristic.

Symbol Operating temperature range ------------------------------------------------------ C - - - - - - - −40° to +85°C

The nominal capacitance value expressed in microfarads (uf) is identified by a three-digit number. When the nominal capacitance is 10 uf or greater, the first two digits represent significant figures and the last digit specifies the number of zeros to follow (example: 10 uf = 100; 150 uf = 151; 1500 uf = 152). When the nominal capacitance value is less than 10 uf (a whole number e.g. 9; a mixed number e.g. 4.7; or a fractional number e.g. 0.1 or 0.56), the letter "R" shall be used to indicate the decimal point and shall be placed where appropriate in the three digit number. When the letter "R" is used, the succeeding digit or digits become significant (example: 2 uf = 2R0; 4.7 uf = 4R7; 0.1 uf = 0R1; 0.56 uf = R56).

The dc rated voltage, dc surge voltage, and capacitance tolerance are identified by a single letter in accordance with table II. TABLE II. DC working voltage, dc surge voltage, and capacitance tolerance.

DC DC DC DC Symbol rated surge Capacitance Symbol rated surge Capacitance voltage voltage tolerance voltage voltage tolerance ------------------------------------------------------------------------------------- volts volts percent volts volts percent C - - - 5 7 −10, +75 K - - - 200 250 −10, +50 D - - - 10 15 −10, +75 M - - - 250 300 −10, +50 E - - - 15 20 −10, +75 N - - - 300 350 −10, +50 F - - - 25 40 −10, +75 P - - - 350 400 −10, +50 G - - - 50 75 −10, +75 Q - - - 400 450 −10, +50 H - - - 100 150 −10, +75 R - - - 450 500 −10, +50 J - - - 150 200 −10, +75

Capacitors covered by this specification are classified by families according to their means of mounting, as specified in table III (see 3.1). TABLE III. Families.

Family Means of mounting Styles ------------------------------------------------------------------------------------- 1 Axial wire-lead capacitors mounted by a tangential bracket CE10, CE11 or wrap-around bands. CE12, and CE13 2 Universal-mounting capacitors mounted by a mounting ring CE31, CE32, CE33, CE34, CE35, and CE36 3 Stud-mounting capacitors mounted by a nut screwed on the CE41, CE42, threaded portion at the terminal end of the capacitor. CE44, and CE45 4 Plug-in capacitors mounted by plugging the terminals into a CE51, CE52, standard, medium octal socket with 0.687 ±0.007-inch- CE53, CE56, diameter pin circle and secured by suitable clamps. CE57, and CE58 5 Bathtub capacitors mounted by mounting lugs. CE63, and CE64 6 Tapped-terminal capacitors (screw insert for bus-bar CE70 and connection), mounted by a wrapround, footed-type CE71 bracket.