820 Ω resistor colour code
Four bands: Grey · Red · Brown · Gold. The first two give the digits, the third multiplies, the fourth states how far off the real part may be.
Nominal
820 Ω
820 ohms
Real range at ±5%
779 Ω – 861 Ω
A gold band allows this much drift.
Series
E12
Held in almost every parts drawer.
Band by band
| Band | Colour | Meaning |
|---|---|---|
| 1 | Grey | 1st digit — 8 |
| 2 | Red | 2nd digit — 2 |
| 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 | 4.02 mA | 13.3 mW | 1/8 W |
| 5 V | 6.1 mA | 30.5 mW | 1/8 W |
| 12 V | 14.6 mA | 176 mW | 1/2 W |
| 24 V | 29.3 mA | 702 mW | 2 W |
What you can actually get
Parts made
175
90th most of 1,465 values
In stock
6,777
across 3 of them
Cheapest at 100
$0.003
each
Tolerances sold
±0.01% to ±10%
10 grades in all
Packages: 0603, 1206, 0805, 0402, 1210, 2512, 0201, 1225. Ratings: 30mW to 10W.
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
$0.19
$0.019 each · Cut Tape (CT) · minimum order 1
The reel price
$0.00185
each, but only from 100,000 pieces up
Sitting in stock
2,832,187
across 15 part numbers
Per piece, ten costs 10.3× the reel price. That gap is why a handful of resistors never costs what the headline price suggests.
Stocked in ±0.5% and ±1% and ±5%, rated 1/20 W to 1/8 W.
Cheapest part you can buy ten of: RC0402JR-07820RL by YAGEO — 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
GreyRedBlackBrownBrown
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 820 Ω — which is why measuring beats reading when it matters.
- 750 Ω712.5 Ω–787.5 Ω
- 787 Ω779.13 Ω–794.87 Ω
- 806 Ω797.94 Ω–814.06 Ω
- 825 Ω816.75 Ω–833.25 Ω
- 845 Ω836.55 Ω–853.45 Ω
- 866 Ω857.34 Ω–874.66 Ω
If you do not have one
Standard values that land within 1% of 820 Ω when combined.