Green Black Silver Gold — 0.5 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.
Value
0.5 Ω
Range at ±5%
0.475 Ω – 0.525 Ω
Standard value
Non-standard
No E24 part carries this value — check you are reading from the right end.
What each band says
| Band | Colour | Meaning |
|---|---|---|
| 1 | Green | 1st digit — 5 |
| 2 | Black | 2nd digit — 0 |
| 3 | Silver | Multiplier — ×0.01 |
| 4 | Gold | Tolerance — ±5% |
In a circuit
Across 5 V
10 A · 50 W · part
Across 12 V
24 A · 288 W · part
Surface-mount marking for the same value: 0R5.
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.