How To Read The Inductor Color Codes
EIA Standard & Military Standard

EIA Standard & Military Standard
Inductor Color Code Reading

Inductor Color Code - Ex. 270μH ± 5%
- First find the tolerance band, it will typically be gold (5%) and sometimes silver (10%).
- Starting from the other end, identify the first band - write down the number associated with that color; in this case Red is 2.
- Now 'read' the next color, here it is Violet so write down a 7 next to the two. (you should have '27' so far.)
- Now read the third or 'multiplier' band and write down that number of 10.
- In this example, the 'multiplier' band is Brown so we get 270 μH.
- If the 'multiplier' band is Gold move the decimal point one to the left.
- If the 'multiplier' band is Silver move the decimal point two places to the left.
Inductance Tolerance Codes
Symbol |
B |
C |
S |
D |
F |
G |
H |
J |
K |
L |
M |
V |
N |
Tolerance |
±0.15nH |
±0.2nH |
±0.3nH |
±0.5nH |
±1% |
±2% |
±3% |
±5% |
±10% |
±15% |
±20% |
±25% |
±30% |