40.2 kΩ resistor colour code
Five bands: Yellow · Black · Red · Red · 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
40.2 kΩ
40,200 ohms
Real range at ±1%
39.798 kΩ – 40.602 kΩ
A brown band allows this much drift.
Series
E96
A 1% precision value. Five bands, not four.
Band by band
| Band | Colour | Meaning |
|---|---|---|
| 1 | Yellow | 1st digit — 4 |
| 2 | Black | 2nd digit — 0 |
| 3 | Red | 3rd digit — 2 |
| 4 | Red | Multiplier — ×100 |
| 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 | 82.1 µA | 271 µW | 1/8 W |
| 5 V | 124 µA | 622 µW | 1/8 W |
| 12 V | 299 µA | 3.58 mW | 1/8 W |
| 24 V | 597 µA | 14.3 mW | 1/8 W |
What you can actually get
Parts made
112
155th most of 1,465 values
In stock
4,500
across 2 of them
Cheapest at 100
$0.0098
each
Tolerances sold
±0.01% to ±1%
6 grades in all
Packages: 1206, 0402, 0805, 0603, 1210, 2512, 0201, SMD,3.2x1.6mm. Ratings: 50mW to 2W.
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
$0.12
$0.012 each · Cut Tape (CT) · minimum order 1
The reel price
$0.001
each, but only from 80,000 pieces up
Sitting in stock
3,617,621
across 50 part numbers
Per piece, ten costs 12.0× 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%, rated 1/20 W to 1/4 W.
Cheapest part you can buy ten of: RNCP0603FTD40K2 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
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 40.2 kΩ — which is why measuring beats reading when it matters.
If you do not have one
Standard values that land within 1% of 40.2 kΩ when combined.