5mm Green LED – Pack of 10

5mm Green LED – Pack of 10

Standard 5mm green LEDs in a through-hole package, supplied as a pack of 10. They are bright, long-lasting and draw very little power, making them the go-to indicator for “OK” / power-on indicators, status lights and traffic-light projects.

Each LED has a longer anode (+) leg and a shorter cathode (−) leg with a flat edge on the cathode side of the lens. Always use a current-limiting resistor in series — see the guide below.

Features

• Green light output, 5mm round lens
• Low power — 20 mA typical forward current
• Long life and low heat
• Through-hole legs fit breadboards, perfboards and PCBs
• Works with Arduino, ESP32, ESP8266 and Raspberry Pi GPIO (with resistor)
• Pack of 10 pieces

Specifications

• Colour: Green
• Size: 5mm
• Forward voltage: 2.0 – 3.0V
• Forward current: 20 mA (typical), 30 mA (max)
• Lens: Diffused / Clear
• Mounting: Through-hole
• Pack size: 10 pieces

Choosing the Right Resistor

• On a 5V supply (Arduino Uno/Nano): use 150Ω – 220Ω
• On a 3.3V supply (ESP32/ESP8266/Raspberry Pi): use 47Ω – 100Ω
• Formula: R = (Supply voltage − LED forward voltage) ÷ 0.02A

Applications

• Power-on and status indicators
• Arduino and ESP32 beginner projects
• Traffic-light and signal models
• Decorative and hobby lighting
• Student practicals and school science projects

Package Includes

• 10 x 5mm Green LEDs

Frequently Asked Questions

Which leg is positive?
The longer leg is the anode (+). The shorter leg, next to the flat edge of the lens, is the cathode (−).

Do I need a resistor?
Yes. Without a series resistor the LED draws too much current and burns out. A 220Ω resistor is a safe default on 5V.

Can I connect it directly to an ESP32 or Arduino pin?
Yes, through a suitable resistor. A GPIO pin can supply enough current for one LED at 10–20 mA.

Do you have other colours?
Yes — red, green, blue and white 5mm LEDs are all available in packs of 10.