180 Ω resistor colour code
Four bands: Brown · Grey · Brown · Gold. The first two give the digits, the third multiplies, the fourth states how far off the real part may be.
Nominal
180 Ω
180 ohms
Real range at ±5%
171 Ω – 189 Ω
A gold band allows this much drift.
Series
E12
Held in almost every parts drawer.
Band by band
| Band | Colour | Meaning |
|---|---|---|
| 1 | Brown | 1st digit — 1 |
| 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 | 18.3 mA | 60.5 mW | 1/8 W |
| 5 V | 27.8 mA | 139 mW | 1/2 W |
| 12 V | 66.7 mA | 800 mW | 2 W |
| 24 V | 133 mA | 3.2 W | no standard part — needs a power resistor or a heatsink |
What you can actually get
Parts made
192
51st most of 1,465 values
In stock
29,352
across 5 of them
Cheapest at 100
$0.003
each
Tolerances sold
±0.1% to ±20%
9 grades in all
Packages: 0805, 1206, 0603, 0402, 1210, 2512, 2010, 1020. 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
$0.14
$0.014 each · Cut Tape (CT) · minimum order 1
The reel price
$0.00217
each, but only from 50,000 pieces up
Sitting in stock
2,970,823
across 7 part numbers
Per piece, ten costs 6.5× the reel price. That gap is why a handful of resistors never costs what the headline price suggests.
Stocked in ±1% and ±5%, rated 1/16 W to 1/4 W.
Cheapest part you can buy ten of: RNCP0805FTD180R 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
BrownGreyBlackBrownBrown
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 180 Ω — which is why measuring beats reading when it matters.
If you do not have one
Standard values that land within 1% of 180 Ω when combined.