100 Ohm Resistor Color Code: 5-Band Explained
Introduction
Resistors are an essential component in electronic circuits, and understanding their color codes is crucial for identifying their values. In this article, we will explore the 100 ohm resistor color code, specifically the 5-band variant.
What is a 5-Band Resistor Color Code?
A 5-band resistor color code is a system used to identify the value of a resistor based on the colors of five stripes or bands painted on the resistor body. The colors of these bands represent the resistor's value in ohms (Ω).
Decoding the 5-Band Color Code
To decode the 5-band color code, we need to understand the significance of each band. Here's a breakdown of the bands and their corresponding colors:
Band 1: First Significant Figure
The first band represents the first significant figure of the resistor value. The colors and their corresponding values are:
- Black: 0
- Brown: 1
- Red: 2
- Orange: 3
- Yellow: 4
- Green: 5
- Blue: 6
- Violet: 7
- Grey: 8
- White: 9
Band 2: Second Significant Figure
The second band represents the second significant figure of the resistor value. The colors and their corresponding values are the same as Band 1.
Band 3: Multiplier
The third band represents the multiplier, which indicates the power of 10 to multiply the value by. The colors and their corresponding multipliers are:
- Black: ×1
- Brown: ×10
- Red: ×100
- Orange: ×1000
- Yellow: ×10,000
- Green: ×100,000
- Blue: ×1,000,000
- Violet: ×10,000,000
Band 4: Tolerance
The fourth band represents the tolerance, which indicates the percentage of error in the resistor value. The colors and their corresponding tolerances are:
- Brown: ±1%
- Red: ±2%
- Orange: ±0.05%
- Yellow: ±0.02%
- Green: ±0.5%
- Blue: ±0.25%
- Violet: ±0.1%
Band 5: Temperature Coefficient
The fifth band represents the temperature coefficient, which indicates the change in resistance per unit change in temperature. The colors and their corresponding temperature coefficients are:
- Brown: 100 ppm/K
- Red: 50 ppm/K
- Orange: 15 ppm/K
- Yellow: 25 ppm/K
- Green: 20 ppm/K
- Blue: 10 ppm/K
- Violet: 5 ppm/K
100 Ohm Resistor Color Code: 5-Band Example
Let's take an example of a 100 ohm resistor with a 5-band color code:
- Band 1: Brown (1)
- Band 2: Black (0)
- Band 3: Red (×100)
- Band 4: Brown (±1%)
- Band 5: Green (20 ppm/K)
To decode this color code, we multiply the values of Band 1 and Band 2 by the multiplier in Band 3:
100 Ω = 10 × 10^2
The result is a 100 ohm resistor with a tolerance of ±1% and a temperature coefficient of 20 ppm/K.
Conclusion
In conclusion, understanding the 5-band resistor color code is essential for identifying the value of a resistor. By following the simple steps outlined in this article, you can easily decode the color code and determine the value of a 100 ohm resistor or any other resistor value.
