SMD code 4020 — 402 Ω
A surface-mount resistor has no bands. This one is a four-digit marking: 402 × 10⁰. Parts marked this way are usually ±1% or tighter.
4020
reads as
402 Ω
The same part, in bands
The through-hole version of 402 Ω carries 5 colour bands instead.
Everything about 402 Ω — power ratings, what ten cost, what is in stock.
Same value, other markings
402 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 | 62.2 mW | 1/8 W |
| 12 V | 358 mW | 1 W |
What you can actually get
Parts made
91
at this value
Common packages
0603 · 0402 · 0805 · 1206
Codes you will mistake it for
One character apart from 4020. On a 0402 part these are a fraction of a millimetre of printing — worth a second look before you solder.