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Capacitor Codes

Colour Codes To Identify Capacitors

Capacitor Codes - Colour Codes To Identify Capacitors

What are Color Codes and What Do They Mean

passiveReading numerical codes on capacitors is easy enough. Where color-coding is concerned, however, the color and the position of the band determine the actual value.

In the first and second positions, the color bands determine the significant digits. In the third position, they determine the multiplier.

In the first and second positions, the value of the color bands correspond to the following numbers:

  • Black = 0
  • Brown = 1
  • Red = 2
  • Orange = 3
  • Yellow = 4
  • Green = 5
  • Blue = 6
  • Violet = 7
  • Grey = 8
  • White = 9

In the third position, the colors correspond to the multipliers as follows:

  • Black = 1
  • Brown = 10
  • Red = 100
  • Orange = 1,000
  • Yellow = 10,000

In the fourth position, which defines the capacitance tolerance, the colors correspond to the percentage values as follows.

  • Black = +/- 20%
  • Brown = +/- 1%
  • Red = +/-2%
  • Green = +/-0.5%
  • Gold= +/-5%
  • Silver= +/-10%

Color bands can also describe the DC working voltage, operating temperature and EIA/vibration of the capacitor.

The aforementioned meetings of special bands on capacitors are not quite as relevant, as the bands are not used as frequently. If there are extra bands, they either describe the voltage rating class of the capacitor or they indicate the outer electrode.

On some capacitors, rather than bands, colored dots are used for the same purpose. These dots are red left to right, just as are the bands, and the meanings of the dots correspond to the meanings of the bands described above.