SMD code 501 — 500 Ω
A surface-mount resistor has no bands. This one is a three-digit marking: 50 × 10¹. Parts marked this way are usually ±5% or ±2%.
501
reads as
500 Ω
Same value, other markings
500 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 | 50 mW | 1/8 W |
| 12 V | 288 mW | 1 W |
What you can actually get
Parts made
12
at this value
Common packages
0805 · 0402
Codes you will mistake it for
One character apart from 501. On a 0402 part these are a fraction of a millimetre of printing — worth a second look before you solder.