27 Ω resistor colour code
Four bands: Red · Violet · Black · Gold. The first two give the digits, the third multiplies, the fourth states how far off the real part may be.
Nominal
27 Ω
27 ohms
Real range at ±5%
25.65 Ω – 28.35 Ω
A gold band allows this much drift.
Series
E12
Held in almost every parts drawer.
Band by band
| Band | Colour | Meaning |
|---|---|---|
| 1 | Red | 1st digit — 2 |
| 2 | Violet | 2nd digit — 7 |
| 3 | Black | Multiplier — ×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 | 122 mA | 403 mW | 1 W |
| 5 V | 185 mA | 926 mW | 2 W |
| 12 V | 444 mA | 5.33 W | no standard part — needs a power resistor or a heatsink |
| 24 V | 889 mA | 21.3 W | no standard part — needs a power resistor or a heatsink |
What you can actually get
Parts made
180
74th most of 1,465 values
In stock
32,970
across 5 of them
Cheapest at 100
$0.0038
each
Tolerances sold
±0.1% to ±10%
7 grades in all
Packages: 0603, 1206, 0805, 0402, 1210, 2512, 2010, 0204. 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
$0.00127
each, but only from 100,000 pieces up
Sitting in stock
4,357,180
across 24 part numbers
Per piece, ten costs 11.0× 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 10 W.
Cheapest part you can buy ten of: RT0402FRE0727RL 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
RedVioletBlackGoldBrown
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 27 Ω — which is why measuring beats reading when it matters.
- 25.5 Ω25.245 Ω–25.755 Ω
- 26.1 Ω25.839 Ω–26.361 Ω
- 26.7 Ω26.433 Ω–26.967 Ω
- 27.4 Ω27.126 Ω–27.674 Ω
- 28 Ω27.72 Ω–28.28 Ω
If you do not have one
Standard values that land within 1% of 27 Ω when combined.