1/5/2023 0 Comments Resistor color codeWhen resistors are produced per military specifications, they will often include a band that indicates reliability. This packaging allows the zero-ohm resistor to be placed on the circuit board using the equipment typically used to place other resistors. Basically, it is a wire link used to connect traces on a printed circuit board (PCB) that is packaged in the same physical package format as a resistor. Single Black Resistor Band or Zero Ohm ResistorĪ single black band on a resistor is called a zero-ohm resistor. To prevent metal and other particles from getting in the coating of high-voltage resistors, the gold and silver bands are often replaced with yellow and gray bands. The first two bands represent the significant digits, the 3rd band is a multiplication factor, the 4th band is for tolerance, and the 5th band is for the temperature coefficient (ppm/K). 5 Band Resistor With the 4th Band of Gold or SilverĪll 5 band resistors with the 4th band of silver or gold form an exception and are utilized on specific or older resistors. The standard E3, E6, E12, E24, E48 and E96 resistor values are listed below.Below we'll go over some of the exceptions to the resistor color code. Standard Resistor Value Series and Tolerances Resistors produced by different manufacturers are compatible for the same designs because of the use of standard values. This helps the supplier with stocking different values. The purpose of this was so that when companies produce resistors with different values of resistance, they would equally space on a logarithmic scale. Capactors, Zener diodes, and inductors also use these standards. These are referred to as preferred values or E-series, published in standard IEC 60063:1963. To make mass manufacturing of resistors easier, the IEC (International Electrotechnical Commision) defined tolerance and resistance values for resistors in 1952. Orange-Orange-Black-Brown-Violet Color CodeĪ resistor colored Orange-Orange-Black-Brown-Violet would be 3.3 kΩ with a tolerance of +/- 0.1%.Ī resistor colored Brown-Green-Grey-Silver-Red would be 1.58 Ω with a tolerance of +/- 2%.Ī resistor colored Blue-Brown-Green-Silver-Blue would be 6.15 Ω with a tolerance of +/- 0.25%. When you see only three color bands on a resistor, you know that it is actually a 4-band code with a blank (20%) tolerance band. The blank (20%) “band” is only used with the “4-band” code (3 colored bands + a blank “band”).Ī resistor colored Yellow-Violet-Orange-Gold would be 47 kΩ with a tolerance of +/- 5%.Ī resistor colored Green-Red-Gold-Silver would be 5.2 Ω with a tolerance of +/- 10%.Ī resistor colored White-Violet-Black would be 97 Ω with a tolerance of +/- 20%. All 5-band resistors use a colored tolerance band. The colors brown, red, green, blue, and violet are used as tolerance codes on 5-band resistors only.
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