Actual value by tolerance
| Tolerance | Band | Minimum | Maximum |
|---|
| ±1% | Brown | 178.2 Ω | 181.8 Ω |
| ±2% | Red | 176.4 Ω | 183.6 Ω |
| ±5% | Gold | 171 Ω | 189 Ω |
| ±10% | Silver | 162 Ω | 198 Ω |
SMD and printed codes
| SMD, 3 digits | 181 |
|---|
| SMD, 4 digits | 1800 |
|---|
| SMD, EIA-96 | not used for this value |
|---|
| Letter code (IEC 60062) | 180R |
|---|
Current and power at common voltages
| Voltage | Current | Power | Resistor rating |
|---|
| 3.3 V | 18.3 mA | 60.5 mW | 1/8 W |
| 5 V | 27.8 mA | 139 mW | 1/2 W |
| 9 V | 50 mA | 450 mW | 1 W |
| 12 V | 66.7 mA | 800 mW | 2 W |
| 24 V | 133 mA | 3.2 W | 10 W |
As an LED resistor
Current through one LED in series with 180 Ω:
| Supply | Red LED (2.0 V) | White or blue LED (3.2 V) |
|---|
| 3.3 V | 7.22 mA | 0.556 mA |
| 5 V | 16.7 mA | 10 mA |
| 12 V | 55.6 mA | 48.9 mA |
LED Resistor Calculator →
Standard series
180 Ω is a standard value in the E12, E24 series, so it comes in almost every resistor kit.
Nearby values
Same first two colors, different multiplier:
Frequently asked questions
What are the colors of a 180 Ω resistor?
On a 4-band resistor: brown, grey, brown, gold. On a 5-band resistor: brown, grey, black, black, brown.
What is the SMD code for 180 Ω?
181 on 3-digit resistors and 1800 on 4-digit (1%) resistors.
How much current flows through a 180 Ω resistor at 5 V?
27.8 mA, dissipating 139 mW. A 1/2 W resistor is enough.
Which resistors get mixed up with 180 Ω?
brown, grey, black, gold is 18 Ω and brown, grey, red, gold is 1.8 kΩ: only the third band changes, so check it carefully.
