51 kΩ resistor colour code
Four bands: Green · Brown · Orange · Gold. The first two give the digits, the third multiplies, the fourth states how far off the real part may be.
Nominal
51 kΩ
51,000 ohms
Real range at ±5%
48.45 kΩ – 53.55 kΩ
A gold band allows this much drift.
Series
E24
E24 only — stocked less often.
Band by band
| Band | Colour | Meaning |
|---|---|---|
| 1 | Green | 1st digit — 5 |
| 2 | Brown | 2nd digit — 1 |
| 3 | Orange | Multiplier — ×1,000 |
| 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 | 64.7 µA | 214 µW | 1/8 W |
| 5 V | 98 µA | 490 µW | 1/8 W |
| 12 V | 235 µA | 2.82 mW | 1/8 W |
| 24 V | 471 µA | 11.3 mW | 1/8 W |
What you can actually get
Parts made
173
95th most of 1,465 values
In stock
64,182
across 7 of them
Cheapest at 100
$0.0013
each
Tolerances sold
±0.1% to ±5%
7 grades in all
Packages: 0603, 0402, 1206, 0805, 1210, 2512, 1225, 0204. Ratings: 50mW to 5W.
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
$0.13
$0.013 each · Cut Tape (CT) · minimum order 1
The reel price
$0.00127
each, but only from 100,000 pieces up
Sitting in stock
3,315,358
across 50 part numbers
Per piece, ten costs 10.2× 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 1/2 W.
Cheapest part you can buy ten of: RT0603FRE1051KL 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
GreenBrownBlackRedBrown
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 51 kΩ — which is why measuring beats reading when it matters.
- 47 kΩ44.65 kΩ–49.35 kΩ
- 48.7 kΩ48.213 kΩ–49.187 kΩ
- 49.9 kΩ49.401 kΩ–50.399 kΩ
- 51.1 kΩ50.589 kΩ–51.611 kΩ
- 52.3 kΩ51.777 kΩ–52.823 kΩ
- 53.6 kΩ53.064 kΩ–54.136 kΩ
- 56 kΩ53.2 kΩ–58.8 kΩ
If you do not have one
Standard values that land within 1% of 51 kΩ when combined.