SMD code 1R0 — 1 Ω
A surface-mount resistor has no bands. This one is a three-digit marking: the R is the decimal point — 1.0 Ω. Parts marked this way are usually ±5% or ±2%.
1R0
reads as
1 Ω
The same part, in bands
The through-hole version of 1 Ω carries 4 colour bands instead.
Everything about 1 Ω — power ratings, what ten cost, what is in stock.
Same value, other markings
1 Ω is printed several ways depending on the part's precision and size. A board can carry all of them at once.
How much it can take
| Across it | Dissipated | Smallest package that copes |
|---|---|---|
| 5 V | 25 W | no standard part — needs a power resistor or a heatsink |
| 12 V | 144 W | no standard part — needs a power resistor or a heatsink |
What you can actually get
Parts made
159
at this value
Common packages
0805 · 0402 · 0603 · 1210
Codes you will mistake it for
One character apart from 1R0. On a 0402 part these are a fraction of a millimetre of printing — worth a second look before you solder.