How to Read Resistor Color Code

How to Read Resistor Color Code

• Resistance is measured in units called ohms.
• Wire wound resistors normally have their values in ohms and tolerance in percent stamped on them.
• For carbon or composition resistors a color code is used.

The resistance values, for several years, have been coded by three colored bands painted around the body of the resistors. If the tolerance is either 5 or 10 percent, a fourth color bond is added. The position of the bands is shown below.

• The first two colors tell the first two digits in the resistance value.
• The third band tells how many zeros follow the first two digits.
• Sometimes a fourth band is present. This band tells the tolerance and will be either gold or silver. A gold band means 5% tolerance, silver 10%, and no fourth band, 20%. The tolerance band tells how close the resistance should be to the value shown by the other three bands.

The Producer of Reading the band is given below.

The Blue-Red-Orange bands signify 62 followed by three zero and would be read as 62000 ohms +-20%.

Also See - Important Current Electricity Notes for Students

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