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Color
Coding For Molded Chokes (Inductors) per MIL-C-15305.
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For cylindrical choke
coils. Cylindrical choke coils shall be
marked with five colored bands. A silver band MIL
identifier of double the width of the other four bands,
located near one end of the coil, identifies military
frequency coils; four other bands of equal width,
three indicating the inductance in microHenries and
the fourth band indicating the tolerance in percent.
Color coding shall be in accordance with the color
code of table. When either the first or second band
of the three bands is gold, this band shall represent
the decimal point for inductance values less than
10, and the other two bands shall represent significant
figures. For inductance value of 10 or more, the first
two bands shall represent significant figures, and
the third band shall represent the multiplier. For
small units, dots may be used instead of bands, when
specified. The diameter of the MIL-identifier dot
shall be larger than the other dots. Typical color
coding examples are shown above.
Color Code Table
| Color |
Significant
Figure |
Multiplier
(1) |
Inductance
Tolerance % |
| Black |
0 |
1 |
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| Brown |
1 |
10 |
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| Red |
2 |
100 |
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| Orange |
3 |
1,000 |
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| Yellow |
4 |
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| Green |
5 |
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| Blue |
6 |
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| Violet |
7 |
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| Gray |
8 |
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| White |
9 |
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| None
(2) |
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20% |
| Silver |
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10% |
| Gold |
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5% |
| (1) |
The
multiplier is the factor by which the two significant
figures are multiplied to yield the nominal inductance
value. |
| (2) |
Indicates
body color of inductor |
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