SMD code 54R2 — 54.2 Ω
A surface-mount resistor has no bands. This one is a four-digit marking: the R is the decimal point — 54.2 Ω. Parts marked this way are usually ±1% or tighter.
54R2
reads as
54.2 Ω
How much it can take
| Across it | Dissipated | Smallest package that copes |
|---|---|---|
| 5 V | 461 mW | 1 W |
| 12 V | 2.66 W | no standard part — needs a power resistor or a heatsink |
What you can actually get
Parts made
2
at this value
Common packages
1206 · 0603
Codes you will mistake it for
One character apart from 54R2. On a 0402 part these are a fraction of a millimetre of printing — worth a second look before you solder.