Impedance Calculator

Resistor Color Code Calculator

Resistance Value:

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Color Code:

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Introduction to Resistor Color Codes

Resistor color codes are a standardized system used to denote the value of resistors. These codes consist of colored bands that indicate the resistor’s value, tolerance, and reliability. In this guide, we’ll cover how to decode resistor color codes for 4-band, 5-band, and 6-band resistors.

4-Band Resistor Color Code

The 4-band resistor is one of the most common types. It consists of four color bands that represent the following:

  • Band 1: First significant digit.
  • Band 2: Second significant digit.
  • Band 3: Multiplier (the power of ten).
  • Band 4: Tolerance (percentage of allowed variance).

5-Band Resistor Color Code

The 5-band resistor provides more precision and is commonly used in higher accuracy applications. It consists of:

  • Band 1: First significant digit.
  • Band 2: Second significant digit.
  • Band 3: Third significant digit.
  • Band 4: Multiplier.
  • Band 5: Tolerance.

6-Band Resistor Color Code

The 6-band resistor is similar to the 5-band resistor but with an added band for temperature coefficient. This type of resistor is used where temperature stability is critical:

  • Band 1: First significant digit.
  • Band 2: Second significant digit.
  • Band 3: Third significant digit.
  • Band 4: Multiplier.
  • Band 5: Tolerance.
  • Band 6: Temperature coefficient (ppm/°C).

Conclusion

Understanding resistor color codes is crucial for working with electronics. By knowing the significance of each band, you can easily determine the resistance value, tolerance, and temperature coefficient of resistors used in your projects. Whether you’re working with 4-band, 5-band, or 6-band resistors, this guide serves as a reference for quick and accurate calculations.