Why choose a 5-band resistor over a 4-band resistor?
5-band resistors offer better accuracy with three significant digits instead of two, and typically have tighter tolerances ranging from ±0.05% to ±2%. They're ideal for precision instrumentation and professional electronics applications.
What is the tolerance band in a 5-band resistor?
The tolerance band (5th band) indicates how much the actual resistance value can vary from the nominal value. Common tolerances include ±1% (brown), ±0.5% (green), and ±0.25% (blue).
How do I calculate the resistance value from color codes?
Take the first three color values as digits, multiply by the multiplier value, and apply the tolerance. For example: Brown(1), Black(0), Black(0), Red(×100), Brown(±1%) = 100 × 100 = 10,000Ω ±1%.
What if I can't determine the color correctly?
Poor lighting or color blindness can make it difficult to distinguish colors. Use proper lighting, compare with a color chart, or use a multimeter to measure the actual resistance value directly.
What is the typical resistance range for 5-band resistors?
5-band resistors typically range from 10 ohms to 10 megohms, covering the most commonly used resistance values in electronic circuits with high precision.
Can the first band of a 5-band resistor be black?
No, the first band of a 5-band resistor cannot be black because it would represent zero as the first significant digit, which would make the resistance value meaningless. It starts from brown (1). You might also find our calculate Resistivity useful.