Digi key resistor color code calculator1/18/2024 ![]() If a gold or silver band is present, then they must be at the right end since they are never used for significant digits. A larger gap between the tolerance band and the other bands is sometimes noticeable. To distinguish the reading direction, the tolerance band width is sometimes printed with 1.5 - 2 times the width of other bands. The reading direction is not always clear. Resistors cases usually have three to six bands that indicate their resistance, tolerance and sometimes their temperature coefficient of resistance (TCR). It describes the coding standard for both resistors and capacitors. The coding is defined in the international standard IEC 60062:2016. Surface mounted resistors (SMD) use another coding system that uses alphanumeric codes printed on its surface instead of color codes. When the resistor body surface is large enough, as in large wattage resistors, the resistance value, tolerance, and wattage are usually printed on the body of the resistor. Color-coding is also used for capacitors, inductors and diodes. Color bands are used because they can be easily and cheaply printed on a small electronic component. The resistance value will be calculated and shown along with the minimum and maximum values.Ĭolor-coding is a method used to indicate the resistive value, tolerance, and temperature coefficient of resistors with low wattage rating because of their small size.For each band, select the matching color in the table column indicating the band number.Select the number of bands on the resistor you are trying to identify.To use the calculator, follow these easy steps: This calculator supports resistors with 3, 4, 5, and 6 bands. It will also calculate the minimum and maximum values based on the tolerance ratio. The TCR is measured in ppm/☌ units.This calculator will help you identify the value, tolerance and temperature coefficient of a color coded resistor by simply selecting the bands colors. The final band represents the temperature coefficient of resistance (TCR), which is the change in resistance per unit resistance as the temperature changes by 1 degree C. The third band is the multiplier and the fourth band is the tolerance.įor 5-band resistors, the first three bands represent the first three significant digits of resistance, followed by the multiplier band, which is then followed by the tolerance band.įinally, for 6-band resistors, the first three bands represent the three digits of resistance, followed by the multiplier band, then followed by the tolerance band. While a fourth band, tolerance, is not available, the tolerance is always ☒0%.įor 4-band resistors, the first two bands represent the first two significant digits of resistance. In 3-band resistors, the first two bands represent the first two significant digits of the resistance value in Ohms. Gold or silver bands are always located at the right-most end as they are only used for multiplier and tolerance bands. The bands are read from left to right, with the tolerance band being often printed at a wider gap from the other bands to distinguish reading direction. Resistors are painted with three to six bands which indicate resistance, tolerance, and sometimes the temperature coefficient of resistance. This resistor color code calculator is designed to help identify and calculate values on your resistors. Many resistors have color-coded bands which identify varying resistance values and tolerances. Circuit design engineers can use resistors to control both the voltage and amperage at a particular point in a circuit. To prevent damage to sensitive components from a voltage overload, a resistor can be used in series with that component, creating a voltage drop and protecting the component from harm. ![]() A resistor is an electrical component regulating the flow of current in a circuit. ![]()
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