3.3 Ω resistor colour code
Four bands: Orange · Orange · Gold · Gold. The first two give the digits, the third multiplies, the fourth states how far off the real part may be.
Nominal
3.3 Ω
3.3 ohms
Real range at ±5%
3.135 Ω – 3.465 Ω
A gold band allows this much drift.
Series
E6
Held in almost every parts drawer.
Band by band
| Band | Colour | Meaning |
|---|---|---|
| 1 | Orange | 1st digit — 3 |
| 2 | Orange | 2nd digit — 3 |
| 3 | Gold | Multiplier — ×0.1 |
| 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 | 1 A | 3.3 W | no standard part — needs a power resistor or a heatsink |
| 5 V | 1.52 A | 7.58 W | no standard part — needs a power resistor or a heatsink |
| 12 V | 3.64 A | 43.6 W | no standard part — needs a power resistor or a heatsink |
| 24 V | 7.27 A | 175 W | no standard part — needs a power resistor or a heatsink |
What you can actually get
Parts made
128
132nd most of 1,465 values
In stock
12,891
across 4 of them
Cheapest at 100
$0.0038
each
Tolerances sold
±0.1% to ±10%
6 grades in all
Packages: 1206, 0805, 0402, 0603, 1210, 2512, 1225, 2010. Ratings: 50mW to 100W.
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
$0.29
$0.029 each · Cut Tape (CT) · minimum order 1
The reel price
$0.00379
each, but only from 100,000 pieces up
Sitting in stock
903,662
across 6 part numbers
Per piece, ten costs 7.7× the reel price. That gap is why a handful of resistors never costs what the headline price suggests.
Stocked in ±1% and ±5%, rated 1/10 W to 25 W.
Cheapest part you can buy ten of: ERJ-2GEJ3R3X by Panasonic Industry — 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
OrangeOrangeBlackGoldBrown
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 3.3 Ω — which is why measuring beats reading when it matters.
- 3 Ω2.85 Ω–3.15 Ω
- 3.16 Ω3.1284 Ω–3.1916 Ω
- 3.24 Ω3.2076 Ω–3.2724 Ω
- 3.32 Ω3.2868 Ω–3.3532 Ω
- 3.4 Ω3.366 Ω–3.434 Ω
- 3.48 Ω3.4452 Ω–3.5148 Ω
- 3.6 Ω3.42 Ω–3.78 Ω
If you do not have one
Standard values that land within 1% of 3.3 Ω when combined.