SMD code 1721 — 1.72 kΩ
A surface-mount resistor has no bands. This one is a four-digit marking: 172 × 10¹. Parts marked this way are usually ±1% or tighter.
1721
reads as
1.72 kΩ
How much it can take
| Across it | Dissipated | Smallest package that copes |
|---|---|---|
| 5 V | 14.5 mW | 1/8 W |
| 12 V | 83.7 mW | 1/4 W |
What you can actually get
Parts made
2
at this value
Common packages
1206
Codes you will mistake it for
One character apart from 1721. On a 0402 part these are a fraction of a millimetre of printing — worth a second look before you solder.