Gold representing tolerance has a value of ± 5%. Violet represent multiplier 7, which is equal to x107.
Here, first two bands represent the value. Now starting from the other end, note down the numbers specific to the color codes as per the table given above.Īssume that we have a resistor with 4 bands as per the picture. Then find the tolerance band which will be either Silver or Gold. First count the number of bands on the resistor. Now let us see how we calculate resistor value using this table. If you rarely come across a resistor with 6 bands, then it is similar to resistor with 5 bands and the 6th band representing the thermal co-efficient.
If the resistor has a 5th band, then it provides more precise value as the first three bands represent the base value, 4th the multiplier and the last one signifying the tolerance. The third and forth band represents the multiplier and tolerance respectively. The first two bands represent the value of the resistor with each band giving the base number. The Resistor Colour Code system is all well and good but we need to understand how to apply it in order to get the correct value of the resistor.Resistor Values are always coded in Ohms (Ω) and they usually have 4 or 5 color bands printed on it.
The Standard Resistor Colour Code Chart : Fixed resistors have resistances that only change slightly with temperature, time or operating voltage. High-power resistors that can dissipate many watts of electrical power as heat, may be used as part of motor controls, in power distribution systems, or as test loads for generators. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses. A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.
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