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10 Ohm Resistor and color code

2025-06-19

10 ohm resistor is one of the commonly use for current limiting, voltage division, and power dissipation. Whether you're building a simple LED circuit or working on complex motor control systems, 10Ω resistors is reliable circuit.

In this blog, we will know the 10 ohms resistor’s color code, size/dimensions, power (Watts), tolerance,packing , applications and FAQs.

10 Ohm Resistor

10 Ohm Resistor Color Code

For 1/4W, 1/2W, 1W, 2W, 3W, 4W, 5W and all small size Resistors shall mark with color coding. colors shall be in accordance with JIS C 0802.

Colour code depends on its tolerance. Here's how to read it:

(Standard 4-band, ±5% Tolerance)

Bands:

· 1st Band (1) → Brown

· 2nd Band (0) → Black

· Multiplier (×1) → Black

· Tolerance (±5%) → Gold

Result:
➡ Brown – Black – Black – Gold = 10Ω ±5%

For ±1% Tolerance (5-band resistor):

· 1st Band (1) → Brown

· 2nd Band (0) → Black

· 3rd Band (0) → Black

· Multiplier (×1) → Black

· Tolerance (±1%) → Brown

➡ Brown – Black – Black – Black – Brown = 10Ω ±1%

Dimensions

Size of Axial resistor depend on its power rating. Here's a table of standard through-hole resistor sizes:

10 Ohm Resistor dimensions size

Power Rating	D	L	d	H
0.25W(1/4W) 10 ohm 0.5 watt resistor	2.55 ± 0.3	6.3 ± 0.5	0.55±0.05	28± 2.0
0.5W(1/2W) 1WS	3.5± 0.3	9.0± 0.5	0.55±0.05	28± 2.0
2WS/ resistor 10 ohm 1 watt	4.6 ± 0.5	11.5 ± 1.0	0.8 ± 0.05	35 ± 2.0
3WS/2W	5.2 ± 0.5	15.5 ± 1.0	0.8 ± 0.05	33 ± 2.0
3W/4W/5WS	6.2 ± 0.5	17.5 ± 1.0	0.8 ± 0.05	32 ± 2.0
10 ohm 5 watt resistor /6W/7WS	8.2 ± 0.5	24.5 ± 1.0	0.8 ± 0.05	38 ± 2.0
7W	8.5	32	0.75	38
8W	8.5	41	0.75	38
9W	8.5	54	0.75	38

Note: Exact dimensions vary by manufacturer, but these are typical values based on industry standards.

Power Rating (Watts)

Typical available in this list:

0.05W(1/20W)	1W	3.75W	12W
0.063W(1/16W)	1.2W	4W	13W
0.1W(1/10W)	1.25W	4.5W	13.5W
0.125W(1/8W)	1.5W	5W	14W
0.167W(1/6W)	1.7W	5.25W	15W
0.2W(1/5W)	1.75W	5.5W	16W
0.25W(1/4W)	2W	6.5W	17W
0.3W	2.25W	7W	10 ohm 20w resistor
0.333W(1/3W)	2.3W	7.5W	25W
0.4W	2.5W	8W	30W
0.5W(1/2W)	2.7W	9W	40W
0.6W	3W	10W	50W
0.667W(2/3W)	3.25W	10.5W	60W
0.75W(3/4W)	3.5W	11W

· Choose base on power dissipation = V² / R or I² × R

Tolerance

Indicates how much the actual resistance can vary from its labeled value. Common tolerance values for 10Ω resistors include:

Tolerance	Symbol	Color Band	Accuracy
±1%	F	Brown	9.9Ω to 10.1Ω
±2%	G	Red	9.8Ω to 10.2Ω
±5%	J	Gold	9.5Ω to 10.5Ω
±10%	K	Silver	9.0Ω to 11.0Ω

±0.005%	±0.01%	±0.02%
±0.05%	±0.1%	±0.25%
±0.5%	±1%	±2%
±3%	±5%	±10%
±20%

· Most common for general use: ±5% (gold band)

· Precision circuits: ±1% or better

Packing Types

· Bulk: Common for hobby and prototyping

· Tape & Reel: For automated SMT assembly

· Cut Tape: For small-quantity needs

· Box: Usually for high-volume distribution

Applications:

The 10 ohm resistor is relatively low resistance, which allows moderate current flow while still providing some current limiting and voltage drop. Here are common applications:

1. Current Limiting

· Use in LED circuits to limit current and prevent damage.

· Helps control startup inrush current in capacitive loads.

2. Power Supply Load

· Acts as a dummy load for testing power supplies or batteries.

· Ensures a minimum load for stable voltage regulation.

3. Snubber or Damping Circuits

· Use with capacitors in snubber networks to suppress voltage spikes in relay and motor circuits.

4. Voltage Divider

· In combination with other resistors, it can create a voltage divider to reduce voltage levels for sensors or ADC inputs.

5. Low-Pass Filter

· Pair with capacitors to form RC filters that smooth out signals or suppress high-frequency noise.

6. Measurement and Sensing

· Use in shunt resistor setups for measuring current via voltage drop.

7. Pull-Down or Pull-Up Resistor

· In digital circuits, a 10Ω value might use where require strong pull-up/down , though higher resistances are more common.

Frequently Asked Questions (FAQs)

1. What is a 10 ohm resistor for?

A 10 ohm resistor is use for current limiting, especially in low-resistance applications like LED drivers, motor circuits, voltage droppers, and protection circuits. Also use for testing, load simulation, and pull-down functions.

Here are specific uses:

· Current Limiting: Protects components like LEDs by restricting the current to safe levels.

· Load Resistor: Acts as a dummy load for testing power supplies or voltage regulators.

· Snubber Networks: Use with capacitors to dampen voltage spikes in relay or motor circuits.

· Voltage Divider: Helps scale down voltage for ADC or sensor inputs when combined with other resistors.

· Sensing Applications: Functions as a shunt resistor to measure current via voltage drop.

2. What color is a 10 ohm resistor?

The standard colour code is:

· Brown–Black–Black–(Gold or Brown for tolerance)

4-Band (±5% Tolerance)

· Brown – Black – Black – Gold

o Brown = 1

o Black = 0

o Black (multiplier ×1)

o Gold = ±5% tolerance

5-Band (±1% Tolerance)

· Brown – Black – Black – Black – Brown

o First three digits = 1, 0, 0

o Multiplier ×1

o Tolerance ±1%

6-Band (±0.1% Precision Resistor)

· Brown – Black – Black – Black – Violet – (Temp. Coeff.)

o Violet = ±0.1% tolerance

o Sixth band indicates temperature coefficient (e.g. Brown = 100 ppm/°C)

3. What is the voltage across a 10 ohm resistor?

Using Ohm's Law (V = I×R):

· If 0.5 A current flows through a 10 ohm resistor, voltage = 10Ω × 0.5A = 5V

· Voltage depends entirely on the current through it

· V = Voltage (Volts)

· I = Current (Amps)

· R = Resistance (Ohms) = 10 Ω in this case

4. What is a 10 ohm resistor connected to a supply voltage alternating between?

If a 10 ohm resistor connect to an AC(alternating current) supply , such as 10V RMS:

· Current (I) = V / R = 10V / 10Ω = 1A RMS

· The voltage across the resistor will also alternate with the supply — it will mirror the supply waveform, just with amplitude governed by Ohm’s Law.

A 10 ohm resistor connect to an AC supply sees a voltage and current alternating in magnitude and polarity, synchronized with the supply waveform.

Read More:

1. What Is The 1K Ohm Resistor?

2. What is 100 Ohm Resistor And Color Code?

3.120 Ohm Resistor- Specifications, Applications, and Features

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