3.3V LOGIC CURRENT LIMITER

330 Ohm Resistor Color Code (330 Ω)

The 330 ohm (330 Ω) resistor is the industry standard LED current limiter for 3.3V microcontrollers (ESP32, Raspberry Pi RP2040, STM32) and works exceptionally well for blue/white LEDs on 5V circuits.

Quick Answer • Color Bands BreakdownIEC 60062 Standard

4-BAND (±5%)Standard Carbon/Metal Film

Orange(1st Digit (3))

Orange(2nd Digit (3))

Brown(Multiplier (×10))

Gold(Tolerance (±5%))

5-BAND (±1%)Precision Metal Film

Orange(1st Digit (3))

Orange(2nd Digit (3))

Black(3rd Digit (0))

Black(Multiplier (×1))

Brown(Tolerance (±1%))

Customize in Live Calculator BelowTolerance: ±5% (Gold) or ±1% (Brown)

Technical Specifications

Nominal Value: 330 Ω
Standard Series: E12, E24
Acceptable Measurement Range: 313.5 Ω to 346.5 Ω (at ±5%)
Typical Power: 1/4 Watt
Max Working Voltage: 250V

SMD Chip Markings

3313-Digit SMD (33 × 10¹ = 330 Ω)

33004-Digit Precision SMD (330 × 10⁰ = 330 Ω)

51AEIA-96 1% SMD (51 = 332, A = ×1)

Common Real-World Circuit Applications

3.3V logic LED current limiting for ESP8266, ESP32, and Raspberry Pi GPIOsBlue and White LED ballast resistors on 5V supply linesAudio output protection resistors

Interactive Tool

Resistor Color Code Calculator

Select band count and click colors below to calculate resistance and tolerance.

Resistor Band SystemShortcuts: 3 · 4 · 5 · 6

4-Band Carbon Film ResistorReading direction: Left to Right

Resistance ValueStandard E12 / E24

1kΩ±5%

Guaranteed Range:±5%

950 Ω↔1.05 kΩ

Standard SeriesE12, E24

Temp. CoefficientN/A (6-band only)

Color Band Sequence:

Common Commercial ValuesClick to load

Select Band Colors

Click any swatch to change value

Live Synced

1st Band1st Digit

2nd Band2nd Digit

3rd BandMultiplier

4th BandTolerance

Inverse Solver

Reverse Resistor Color Code Lookup

Enter resistance value in Ohms (Ω) to determine the exact color bands.

Enter Target Resistance

Live Validation

Resistance ValueExamples: 4.7k, 220, 1M, 0.47

Ohms

✓Recognized: 4.7 kΩ (4,700 Ω)

Band Count

Tolerance

Quick Presets:Click to test

Calculated Color BandsStandard E24

Exact Resistance:4.7 kΩ±5%

Color Bands Sequence (Left to Right):

Band Breakdown:

Want to tweak these bands?

FREQUENTLY ASKED QUESTIONS

Common Questions About 330 Ohm Resistor Color Code (330 Ω)

What color bands are on a 330 ohm resistor?▼

On a standard 4-band 330 ohm resistor, the colors are Orange, Orange, Brown, and Gold. In a 5-band resistor, they are Orange, Orange, Black, Black, and Brown.

IEC 60062 Standard Table

Complete Resistor Color Code Chart

View the full 12-color lookup matrix covering significant figures 0–9, multipliers from 0.01 to 1G, and tolerance bands from ±0.05% to ±20%. Includes searchable values and instant CSV export.

Explore Full Color Chart→

Engineering Guide

How to Read & Calculate Resistor Bands

Learn step-by-step reading rules, standard E-series decade values (E12, E24, E96), memory mnemonics, and surface-mount (SMD) 3-digit and EIA-96 code conversion formulas.

Read Full Engineering Guide→

EXPLORE RESISTOR CODES