43 Ω resistor colour code
Four bands: Yellow · Orange · Black · Gold. The first two give the digits, the third multiplies, the fourth states how far off the real part may be.
Nominal
43 Ω
43 ohms
Real range at ±5%
40.85 Ω – 45.15 Ω
A gold band allows this much drift.
Series
E24
E24 only — stocked less often.
Band by band
| Band | Colour | Meaning |
|---|---|---|
| 1 | Yellow | 1st digit — 4 |
| 2 | Orange | 2nd digit — 3 |
| 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 | 76.7 mA | 253 mW | 1 W |
| 5 V | 116 mA | 581 mW | 2 W |
| 12 V | 279 mA | 3.35 W | no standard part — needs a power resistor or a heatsink |
| 24 V | 558 mA | 13.4 W | no standard part — needs a power resistor or a heatsink |
What you can actually get
Parts made
176
87th most of 1,465 values
In stock
13,439
across 3 of them
Cheapest at 100
$0.0015
each
Tolerances sold
±0.01% to ±5%
7 grades in all
Packages: 0805, 1206, 0603, 0402, 1210, 2010, 2512, 0207. Ratings: 30mW to 30W.
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
$0.20
$0.020 each · Cut Tape (CT) · minimum order 1
The reel price
$0.00198
each, but only from 100,000 pieces up
Sitting in stock
1,183,305
across 20 part numbers
Per piece, ten costs 10.1× 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 1/4 W.
Cheapest part you can buy ten of: RMCF0402FT43R0 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
YellowOrangeBlackBlackBrown
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 43 Ω — which is why measuring beats reading when it matters.
- 39 Ω37.05 Ω–40.95 Ω
- 41.2 Ω40.788 Ω–41.612 Ω
- 42.2 Ω41.778 Ω–42.622 Ω
- 43.2 Ω42.768 Ω–43.632 Ω
- 44.2 Ω43.758 Ω–44.642 Ω
- 45.3 Ω44.847 Ω–45.753 Ω
- 47 Ω44.65 Ω–49.35 Ω
If you do not have one
Standard values that land within 1% of 43 Ω when combined.