ALLIED'S ELECTRONICS DATA HANDBOOK

Military Capacitor Letter-Number Codes

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    The long used color-code method of identifying fixed capacitors is rapidly being replaced
under the currently effective Military Standards System, where type, capacitance, toler-
ence, voltage, temperature range and all required specifications are designated by letter
and number symbols stamped on the capacitor case in place of the color-code system pre-
viously used. 		 
    Because of the increasing use of military styles of fixed capacitors throughout the elec-
tronics industry and the resulting confusion for those not familiar with this system, we
publish on the following pages, basic outlines of the designating letter-number symbols
covering MIL-C-91, MIL-C-20 and MIL-C-5 specifications now used in place of the color
codes shown on the three preceeding pages. 		 
     
  MIL-C-91A    TYPE   CN  
  Capacitors    *   Fixed    *   Paper Dielectric    *   Monmetallic Cases  
     
             
  CN     22     A     E     202     N  
                     1            2           3             4             5   
     
 
1 STYLE
Rectangular molded case styles,
20, 22, 41, 43.  Square
molded case styles, 30, 35.
 
2 CHARACTERISTIC
A = -55 to +85 oC
E = -55 to +85 oC
as per tables and charts in
MIL-C-91
 
     
 
3 VOLTAGE
DC working at 40 oC.
Y
C
X
E 		=
=
=
= 		120
200
300
400 		|
|
|
| 		F
Z
G
  		=
=
=
  		600
800
1000
 
 
4 CAPACITANCE
Expressed in picofarads.  First
two digits represent significant
figures.  Last digit indicates the
number of zeros to follow.
 
     
 
5 CAPACITANCE
TOLERANCE
K  =  ± 10%
M  =  ± 20%
N  =  ± 30%
 
     

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