SMD code 3120 — 312 Ω
A surface-mount resistor has no bands. This one is a four-digit marking: 312 × 10⁰. Parts marked this way are usually ±1% or tighter.
3120
reads as
312 Ω
How much it can take
| Across it | Dissipated | Smallest package that copes |
|---|---|---|
| 5 V | 80.1 mW | 1/4 W |
| 12 V | 462 mW | 1 W |
What you can actually get
Parts made
2
at this value
Common packages
0603 · 0805
Codes you will mistake it for
One character apart from 3120. On a 0402 part these are a fraction of a millimetre of printing — worth a second look before you solder.