What is the Color Code for a 100 Ohm Resistor?
On this page, you'll find the exact color bands for 100 ohm resistors in 4-band, 5-band, and 6-band configurations. Use this information for your electronics projects or as a quick reference when identifying resistors.
4-Band 100 Ohm Resistor Color Code
For a standard 4-band 100 ohm resistor, the color bands are as follows:
- 1st Band (Significant Figure): Brown
- 2nd Band (Significant Figure): Black
- 3rd Band (Multiplier): Brown
- 4th Band (Tolerance): Typically Gold (±5%) or Silver (±10%)
Therefore, a 4-band 100 ohm resistor is usually identified by the colors: Brown, Black, Brown, Gold or Brown, Black, Brown, Silver.
The sequence of the bands should be read from left to right, starting with the band closest to one of the leads.
4-Band 100 Ohm Resistor
Value: 100 Ω ±5%
Brown, Black, Brown, Gold
5-Band 100 Ohm Resistor Color Code
For a more precise 5-band 100 ohm resistor, the color bands are:
- 1st Band (Significant Figure): Brown
- 2nd Band (Significant Figure): Black
- 3rd Band (Significant Figure): Black
- 4th Band (Multiplier): Black
- 5th Band (Tolerance): Typically Brown (±1%), Red (±2%), or Green (±0.5%)
Thus, a 5-band 100 ohm resistor is typically: Brown, Black, Black, Black, Brown (±1%), Brown, Black, Black, Black, Red (±2%), or Brown, Black, Black, Black, Green (±0.5%).
5-band resistors offer higher accuracy due to the additional significant figure band.
5-Band 100 Ohm Resistor
Value: 100 Ω ±1%
Brown, Black, Black, Black, Brown
6-Band 100 Ohm Resistor Color Code
A 6-band 100 ohm resistor builds upon the 5-band configuration by adding a temperature coefficient band:
- 1st Band (Significant Figure): Brown
- 2nd Band (Significant Figure): Black
- 3rd Band (Significant Figure): Black
- 4th Band (Multiplier): Black
- 5th Band (Tolerance): Typically Brown (±1%), Red (±2%), or Green (±0.5%)
- 6th Band (Temperature Coefficient): Varies depending on the resistor type (e.g., Brown: 100 ppm/K)
Therefore, a common 6-band 100 ohm resistor might be: Brown, Black, Black, Black, Brown, Brown.
The sixth band indicates the temperature coefficient, which specifies how much the resistor's value changes with temperature.
6-Band 100 Ohm Resistor
Value: 100 Ω ±1%, 100ppm/K
Brown, Black, Black, Black, Brown, Brown
Quick Lookup: 100 Ohm Resistor Color Codes
| Number of Bands | Color Code | Typical Tolerance | Value |
|---|---|---|---|
| 4-Band | Brown, Black, Brown, Gold | ±5% | 100 Ω |
| 4-Band | Brown, Black, Brown, Silver | ±10% | 100 Ω |
| 5-Band | Brown, Black, Black, Black, Brown | ±1% | 100 Ω |
| 6-Band | Brown, Black, Black, Black, Brown, Brown | ±1%, 100ppm/K | 100 Ω |
Need to Decode Other Resistor Values?
Use our free online Resistor Color Code Calculator to find the color codes for any resistor value or to calculate the value from the color bands.
Resistor Color Code Chart
Refer to our comprehensive Resistor Color Code Chart for a complete list of colors and their corresponding values, multipliers, tolerances, and temperature coefficients.
What is a 100 Ohm Resistor?
A 100 ohm resistor is a resistor with an electrical resistance of 100 ohms. It's a common value used in various electronic circuits for current limiting, voltage division, and as pull-up or pull-down resistors.
Common applications for 100 ohm resistors include:
- Termination resistors in high-frequency signal lines
- Current limiting for LEDs and other components
- Input and output impedance matching
- Audio circuits for volume control and signal attenuation
- Protection circuits for sensitive components