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Ohm Bands

Red Black Gold Gold — 2 Ω

Read left to right, starting from the end where the bands are grouped. The gold band is the tolerance and always sits alone at the far end.

20×0.1±5%
Red2Black0Gold×0.1Gold±5%

Value

2 Ω

Range at ±5%

1.9 Ω – 2.1 Ω

Standard value

E24

Full page for 2 Ω →


What each band says

BandColourMeaning
1Red1st digit — 2
2Black2nd digit — 0
3GoldMultiplier — ×0.1
4GoldTolerance — ±5%

In a circuit

Across 5 V

2.5 A · 12.5 W · part

Across 12 V

6 A · 72 W · part

Surface-mount marking for the same value: 200.

If you misread one band

Brown and red, or orange and red, are easy to confuse under a desk lamp. These are the codes one band away from this one.