243 Ω resistor colour code
Five bands: Red · Yellow · Orange · Black · Brown. The first three give the digits — a precision value needs all three — then the multiplier, then how far off the real part may be.
Nominal
243 Ω
243 ohms
Real range at ±1%
240.57 Ω – 245.43 Ω
A brown band allows this much drift.
Series
E96
A 1% precision value. Five bands, not four.
Band by band
| Band | Colour | Meaning |
|---|---|---|
| 1 | Red | 1st digit — 2 |
| 2 | Yellow | 2nd digit — 4 |
| 3 | Orange | 3rd digit — 3 |
| 4 | Black | Multiplier — ×1 |
| 5 | Brown | Tolerance — ±1% |
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 | 13.6 mA | 44.8 mW | 1/8 W |
| 5 V | 20.6 mA | 103 mW | 1/4 W |
| 12 V | 49.4 mA | 593 mW | 2 W |
| 24 V | 98.8 mA | 2.37 W | 5 W |
What you can actually get
Parts made
89
353rd most of 1,465 values
In stock
0
across 0 of them
Cheapest at 100
$0.0088
each
Tolerances sold
±0.01% to ±1%
5 grades in all
Packages: 0805, 0603, 1206, 0402, 2512, 2010, 1210, 0201. Ratings: 30mW to 1W.
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
$0.21
$0.021 each · Cut Tape (CT) · minimum order 1
The reel price
$0.00218
each, but only from 100,000 pieces up
Sitting in stock
290,961
across 2 part numbers
Per piece, ten costs 9.6× the reel price. That gap is why a handful of resistors never costs what the headline price suggests.
Stocked in ±1%, rated 1/16 W to 1/8 W.
Cheapest part you can buy ten of: RC0402FR-07243RL 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
Values that can overlap this one
At ±1% the tolerance bands of neighbouring values run into each other. A part sold as one of these could measure the same as a 243 Ω — which is why measuring beats reading when it matters.
If you do not have one
Standard values that land within 1% of 243 Ω when combined.