SMD code 644 — 640 kΩ
A surface-mount resistor has no bands. This one is a three-digit marking: 64 × 10⁴. Parts marked this way are usually ±5% or ±2%.
644
reads as
640 kΩ
Same value, other markings
640 kΩ 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 | 39.1 µW | 1/8 W |
| 12 V | 225 µW | 1/8 W |
What you can actually get
Parts made
1
at this value
Common packages
0603
Codes you will mistake it for
One character apart from 644. On a 0402 part these are a fraction of a millimetre of printing — worth a second look before you solder.