Classification of resistors consists of three main properties. Resistance, measured in ohms, Tolerance of the resistance value, shown as a percentage and Power handling capacity, measured in watts. The first two can be taken from the table below using the 4 or 5 band code as appropriate. The power handling capacity is not normally indicated with bands but can sometimes be printed on the component itself, particularly for the higher wattage resistors. The color codes apply to all types of resistors.

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You can go here for an online resistor calculator. Just dial in the colors you see on the resistor and the value will be calculated for you. There are 4 and 5 band color code options.




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