SMD code 3971 — 3.97 kΩ
A surface-mount resistor has no bands. This one is a four-digit marking: 397 × 10¹. Parts marked this way are usually ±1% or tighter.
3971
reads as
3.97 kΩ
How much it can take
| Across it | Dissipated | Smallest package that copes |
|---|---|---|
| 5 V | 6.3 mW | 1/8 W |
| 12 V | 36.3 mW | 1/8 W |
What you can actually get
Parts made
1
at this value
Common packages
0805
Codes you will mistake it for
One character apart from 3971. On a 0402 part these are a fraction of a millimetre of printing — worth a second look before you solder.