3mm Red LEDs
Standard T1 ThroughHole Light Emitting Diodes
3mm red LEDs are compact, throughhole components that provide a reliable visual indicator for electronics projects. With a standard round T1 package and 2.54mm pin spacing, they are widely used for breadboard prototyping, Arduino projects, and PCB indicators.
Low Forward Voltage - Operates at 1.8V to 2.2V, compatible with most logic circuits
Standard 3mm Package - Fits breadboards, LED holders, and PCB holes easily
Typical forward current is 20mA with current limiting resistor required
Long lead is Anode (+), short lead is Cathode (-)
Do not exceed 20mA to 30mA max current
Technical Specifications (Typical)
| Parameter | Value |
|---|
| Package | 3mm Round (T-1) |
| Forward Voltage | 1.8V to 2.2V |
| Max Forward Current | 20mA to 30mA |
| Dominant Wavelength | 620nm to 635nm |
| Viewing Angle | 20° to 60° |
| Luminous Intensity | 5mcd to 5000mcd+ |
## Key Features
+High Brightness Options Available in standard, bright, and ultrabright variants
+Multiple Lens Types Clear, diffused, redtinted, or milky-white lenses available
+Long Life Solidstate reliability with low power consumption
= Applications =
- Power and status indicators
- Arduino and microcontroller projects
- Breadboard prototyping and PCBs
- Decorative and accent lighting
- Alarm and warning indicators
Reliable and Widely Used - A standard LED format with consistent performance
Easy Integration - Works with all microcontrollers and development boards
√ Available in packs of 10, 100, and 500+
√ Compatible with standard 3mm LED holders and bezels
√ Low power consumption for battery-powered projects
Troubleshooting
LED not lighting:
- Check polarity: anode to positive, cathode to ground
- Verify current-limiting resistor is installed
- Ensure supply voltage meets forward voltage requirement
Dim brightness:
- Confirm correct resistor value
- Check for loose connections