100 kΩ resistor colour code
Four bands: Brown · Black · Yellow · Gold. The first two give the digits, the third multiplies, the fourth states how far off the real part may be.
Nominal
100 kΩ
100,000 ohms
Real range at ±5%
95 kΩ – 105 kΩ
A gold band allows this much drift.
Series
E6
Held in almost every parts drawer.
Band by band
| Band | Colour | Meaning |
|---|---|---|
| 1 | Brown | 1st digit — 1 |
| 2 | Black | 2nd digit — 0 |
| 3 | Yellow | Multiplier — ×10,000 |
| 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 | 33 µA | 109 µW | 1/8 W |
| 5 V | 50 µA | 250 µW | 1/8 W |
| 12 V | 120 µA | 1.44 mW | 1/8 W |
| 24 V | 240 µA | 5.76 mW | 1/8 W |
What you can actually get
Parts made
287
4th most of 1,465 values
In stock
313,569
across 22 of them
Cheapest at 100
$0.0005
each
Tolerances sold
±0.01% to ±20%
11 grades in all
Packages: 0603, 0805, 1206, 0402, 2512, 1210, 2010, 0201. Ratings: 30mW to 50W.
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
$0.0021
each, but only from 100,000 pieces up
Sitting in stock
32,614,651
across 8 part numbers
Per piece, ten costs 9.5× the reel price. That gap is why a handful of resistors never costs what the headline price suggests.
Stocked in ±1% and ±5%, rated 1/16 W to 1/8 W.
Cheapest part you can buy ten of: RMCF0402FT100K 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
BrownBlackBlackOrangeBrown
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 100 kΩ — which is why measuring beats reading when it matters.
- 91 kΩ86.45 kΩ–95.55 kΩ
- 95.3 kΩ94.347 kΩ–96.253 kΩ
- 97.6 kΩ96.624 kΩ–98.576 kΩ
- 102 kΩ100.98 kΩ–103.02 kΩ
- 105 kΩ103.95 kΩ–106.05 kΩ
- 110 kΩ104.5 kΩ–115.5 kΩ
If you do not have one
Standard values that land within 1% of 100 kΩ when combined.