SMD code 221 — 220 Ω
A surface-mount resistor has no bands. This one is a three-digit marking: 22 × 10¹. Parts marked this way are usually ±5% or ±2%.
221
reads as
220 Ω
The same part, in bands
The through-hole version of 220 Ω carries 4 colour bands instead.
Everything about 220 Ω — power ratings, what ten cost, what is in stock.
Same value, other markings
220 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 | 114 mW | 1/4 W |
| 12 V | 655 mW | 2 W |
What you can actually get
Parts made
243
at this value
Common packages
0603 · 0805 · 1206 · 0402
Codes you will mistake it for
One character apart from 221. On a 0402 part these are a fraction of a millimetre of printing — worth a second look before you solder.