5.1 kΩ resistor colour code
Four bands: Green · Brown · Red · Gold. The first two give the digits, the third multiplies, the fourth states how far off the real part may be.
Nominal
5.1 kΩ
5,100 ohms
Real range at ±5%
4.845 kΩ – 5.355 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 | Red | Multiplier — ×100 |
| 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 | 647 µA | 2.14 mW | 1/8 W |
| 5 V | 980 µA | 4.9 mW | 1/8 W |
| 12 V | 2.35 mA | 28.2 mW | 1/8 W |
| 24 V | 4.71 mA | 113 mW | 1/4 W |
What you can actually get
Parts made
185
62nd most of 1,465 values
In stock
25,967
across 8 of them
Cheapest at 100
$0.0015
each
Tolerances sold
±0.01% to ±5%
9 grades in all
Packages: 0805, 1206, 0603, 0402, 1210, 2010, 2512, 0204. Ratings: 30mW to 3W.
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
$0.15
$0.015 each · Cut Tape (CT) · minimum order 1
The reel price
$0.00127
each, but only from 100,000 pieces up
Sitting in stock
8,380,055
across 36 part numbers
Per piece, ten costs 11.8× the reel price. That gap is why a handful of resistors never costs what the headline price suggests.
Stocked in ±0.1% and ±0.5% and ±1% and ±5%, rated 1/20 W to 1/4 W.
Cheapest part you can buy ten of: CR0402-FX-5101GLF by Bourns 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
GreenBrownBlackBrownBrown
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 5.1 kΩ — which is why measuring beats reading when it matters.
- 4.7 kΩ4.465 kΩ–4.935 kΩ
- 4.87 kΩ4.8213 kΩ–4.9187 kΩ
- 4.99 kΩ4.9401 kΩ–5.0399 kΩ
- 5.11 kΩ5.0589 kΩ–5.1611 kΩ
- 5.23 kΩ5.1777 kΩ–5.2823 kΩ
- 5.36 kΩ5.3064 kΩ–5.4136 kΩ
- 5.6 kΩ5.32 kΩ–5.88 kΩ
If you do not have one
Standard values that land within 1% of 5.1 kΩ when combined.