How To Read A Resistor Value ?
Reading a resistor value is an essential basic for electronics work and a very easy one. first of all the most common used color code is 4 bands as the value of a resistor is in the 4 colors around it.
4 Colors Resistor Type:
the first two bands or colors represent the resistance value in digits, the third color or band represent the multiplier which means how many zeros after the two digits,at last the fourth represents the tolerance or accuracy of the resistor the most common is gold which means ±5%.
Resistor Color Code Table
5 Colors Resistor Type:
In addition the 5 bands type its the same except the first three are the digits and the forth is the multiplier leaving the fifth color band of the resistor to be the tolerance and that’s it for understanding the colors. now the color code is this one
| Color | 1st digit | 2nd digit | 3rd digit* | Multiplier | Tolerance | Temp. Coef. | Fail Rate |
|---|---|---|---|---|---|---|---|
| Black | 0 | 0 | 0 | ×100 | |||
| Brown | 1 | 1 | 1 | ×101 | ±1% (F) | 100 ppm/K | 1% |
| Red | 2 | 2 | 2 | ×102 | ±2% (G) | 50 ppm/K | 0.1% |
| Orange | 3 | 3 | 3 | ×103 | 15 ppm/K | 0.01% | |
| Yellow | 4 | 4 | 4 | ×104 | 25 ppm/K | 0.001% | |
| Green | 5 | 5 | 5 | ×105 | ±0.5% (D) | ||
| Blue | 6 | 6 | 6 | ×106 | ±0.25%(C) | ||
| Violet | 7 | 7 | 7 | ×107 | ±0.1% (B) | ||
| Gray | 8 | 8 | 8 | ×108 | ±0.05% (A) | ||
| White | 9 | 9 | 9 | ×109 | |||
| Gold | ×0.1 | ±5% (J) | |||||
| Silver | ×0.01 | ±10% (K) | |||||
| None | ±20% (M) |