680 Ω resistor colour code
Four bands: Blue · Grey · Brown · Gold. The first two give the digits, the third multiplies, the fourth states how far off the real part may be.
Nominal
680 Ω
680 ohms
Real range at ±5%
646 Ω – 714 Ω
A gold band allows this much drift.
Series
E6
Held in almost every parts drawer.
Band by band
| Band | Colour | Meaning |
|---|---|---|
| 1 | Blue | 1st digit — 6 |
| 2 | Grey | 2nd digit — 8 |
| 3 | Brown | Multiplier — ×10 |
| 4 | Gold | Tolerance — ±5% |
How much it can take
Current and dissipation across the resistor, and the package you need. The suggested rating keeps a factor of two in hand, which is what anyone building a board actually does.
| Across it | Current | Dissipated | Package to pick |
|---|---|---|---|
| 3.3 V | 4.85 mA | 16 mW | 1/8 W |
| 5 V | 7.35 mA | 36.8 mW | 1/8 W |
| 12 V | 17.6 mA | 212 mW | 1/2 W |
| 24 V | 35.3 mA | 847 mW | 2 W |
What you can actually get
Parts made
209
26th most of 1,465 values
In stock
13,070
across 5 of them
Cheapest at 100
$0.002
each
Tolerances sold
±0.1% to ±10%
8 grades in all
Packages: 1206, 0805, 0603, 0402, 1210, 2512, 2010, 0201. Ratings: 30mW to 13W.
What ten of them actually cost
The price everyone quotes is the reel price. If you want ten, you cannot buy the reel — and the real figure is usually several times higher per piece.
Ten pieces
$0.20
$0.020 each · Cut Tape (CT) · minimum order 1
The reel price
$0.001
each, but only from 80,000 pieces up
Sitting in stock
10,095,755
across 13 part numbers
Per piece, ten costs 20.0× the reel price. That gap is why a handful of resistors never costs what the headline price suggests.
Stocked in ±1% and ±5%, rated 1/20 W to 1/4 W.
Cheapest part you can buy ten of: RMCF0603JT680R by Stackpole Electronics Inc — see it at Digi-Key.
Assembly stock from the JLCPCB library, read 2026-09-24. Retail prices and stock from Digi-Key, read 2026-09-24. Prices move — check the product page before ordering. That is what a board house will place for you — not everything a distributor sells.
The same value, marked differently
Five bands
BlueGreyBlackBrownBrown
Three significant digits and a ±1% band.
Values that can overlap this one
At ±5% the tolerance bands of neighbouring values run into each other. A part sold as one of these could measure the same as a 680 Ω — which is why measuring beats reading when it matters.
- 620 Ω589 Ω–651 Ω
- 649 Ω642.51 Ω–655.49 Ω
- 665 Ω658.35 Ω–671.65 Ω
- 681 Ω674.19 Ω–687.81 Ω
- 698 Ω691.02 Ω–704.98 Ω
- 715 Ω707.85 Ω–722.15 Ω
- 750 Ω712.5 Ω–787.5 Ω
If you do not have one
Standard values that land within 1% of 680 Ω when combined.