Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes USAF radar shop Notable Quotes App Notes Calculators Education Engineering Magazines RF Cafe Software,T-Shirts,Coffee Mugs Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Stencils for Visio RF & EE Shapes for Word Advertising RF Cafe Homepage Sudoku puzzles Test notes Thank you for visiting RF Cafe!
RF Cascade Workbook 2018 (GS) - RF Cafe

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    
4-Band EIA Example 5-Band Mil-Spec Example
5 - 6 - 1 - Gold
56 * 101 µH, ±5%
56 * 10 µH, ±5%
56 µH, ±5%

Inductor 4-Band EIA Color Code - RF Cafe 

Silver - 6 - 2 - Gold - Red
Mil-Spec 62 * 0.1 µH, ±2%
Mil-Spec 0.62 µH, ±2%
Mil-Spec 620 nH, ±2%

Inductor 5-Band Mil-Spec Color Code - RF Cafe

Related Pages on RF Cafe
- Inductors & Inductance Calculations
- Inductance Conversions
- Standard Inductor Values
- Inductor Vendors

 

 

Posted  February 9, 2015

Windfreak Technologies Triad RF Systems
QuinStar - RF Cafe
About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2018
Webmaster:
    Kirt Blattenberger,
    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:  AirplanesAndRockets.com

spacer