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Inductor Color Codes
Two methods of inductor markings are predominant - EIA (Electronic Industries Association) and Mil-Spec (Military Specification). Both use the standard color-number association familiar with color-coded resistors. The chart and examples below show that a Mil-Spec inductor can be identified by the presence of a double-width silver band at the left edge. Unless specified otherwise by the manufacturer, units are in microhenrys (µH). Mil-Spec inductors - and possibly some EIA types - use a silver or gold band in the multiplier to denote 0.1 and 0.01, respectively.
| Inductor Color Codes(4-Band EIA and 5-Band Mil-Spec Inductors) | |||||||||
| Color | Mil-Spec Identifier Double-Width Silver Band |
1st Significant Digit |
2nd Significant Digit |
Multiplier | Tolerance | ||||
| Silver | Mil-Spec | 0.01 | ±10% | ||||||
| Gold | 0.1 | ±5% | |||||||
| Black | 0 | 0 | 1 | ||||||
| Brown | 1 | 1 | 10 | ±1% | |||||
| Red | 2 | 2 | 100 | ±2% | |||||
| Orange | 3 | 3 | 1000 (=1k) | ±3% | |||||
| Yellow | 4 | 4 | 10k | ±4% | |||||
| Green | 5 | 5 | 100k | ||||||
| Blue | 6 | 6 | 1000k | ||||||
| Violet | 7 | 7 | |||||||
| Gray | 8 | 8 | |||||||
| White | 9 | 9 | |||||||
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Related Pages on RF Cafe
- Inductors & Inductance Calculations
Posted February 9, 2015
Copyright: 1996 - 2026 |
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