0.1 ohm resistor color code

The color code for 100 mΩ is brown, black, silver, gold on a 4-band resistor (±5%) and brown, black, black, pink, brown on a 5-band resistor (±1%).

Color bands

4 bands, ±5%Brown, Black, Silver, Gold

5 bands, ±1%Brown, Black, Black, Pink, Brown

6 bands, ±1%, 100 ppm/KBrown, Black, Black, Pink, Brown, Brown

Open 100 mΩ in the color code calculator →

Actual value by tolerance

Tolerance	Band	Minimum	Maximum
±1%	Brown	99 mΩ	101 mΩ
±2%	Red	98 mΩ	102 mΩ
±5%	Gold	95 mΩ	105 mΩ
±10%	Silver	90 mΩ	110 mΩ

SMD and printed codes

SMD, 3 digits	`R10`
SMD, 4 digits	`R100`
SMD, EIA-96	`01Z`
Letter code (IEC 60062)	`R1`

Current and power at common voltages

Voltage	Current	Power	Resistor rating
3.3 V	33 A	109 W	over 10 W
5 V	50 A	250 W	over 10 W
9 V	90 A	810 W	over 10 W
12 V	120 A	1.44 kW	over 10 W
24 V	240 A	5.76 kW	over 10 W

As an LED resistor

Current through one LED in series with 100 mΩ:

Supply	Red LED (2.0 V)	White or blue LED (3.2 V)
3.3 V	13000 mA	1000 mA
5 V	30000 mA	18000 mA
12 V	100000 mA	88000 mA

Above 20 mA: too much for a common 5 mm LED.

LED Resistor Calculator →

Standard series

100 mΩ is a standard value in the E6, E12, E24, E48, E96 series. Check the tolerance and power rating of the actual component.

Nearby values

220 mΩ →

Same first two colors, different multiplier:

1 Ω 10 Ω 100 Ω 1 kΩ 10 kΩ 100 kΩ 1 MΩ 10 MΩ

Frequently asked questions

What are the colors of a 100 mΩ resistor?

On a 4-band resistor: brown, black, silver, gold. On a 5-band resistor: brown, black, black, pink, brown.

What is the SMD code for 100 mΩ?

R10 on 3-digit resistors and R100 on 4-digit (1%) resistors.

How much current flows through a 100 mΩ resistor at 5 V?

50 A, dissipating 250 W: more than a standard resistor can handle.

Which resistors get mixed up with 100 mΩ?

brown, black, pink, gold is 10 mΩ and brown, black, gold, gold is 1 Ω: only the third band changes, so check it carefully.