Basics - LED Characteristics

Light Colour		Forward voltage at If= 20mA
		Min V	Typical V
Red		1.7	2.0
Yellow		1.8	2.1
Orange/ Amber		1.8	2.1
Green (low)		2.0	2.2
Green (high)		3.0	3.1 to 4.0
Pink		3.0	3.2
Purple		3.0	3.2
White		3.0	3.3
Blue		3.2	3.4

 

Notes:

1 LEDs can have low brightness (< 1000 mCd) and angle of light directionality of 85 degrees;

2 LEDs can have high brightness (> 5000 mCd) and angle of light directionality of 40 degrees;

3 Green LEDs can be either low or high brightness and have a range of forward voltages as shown.  

4 Reverse breakdown voltage is about 5V. Exceeding this usually damages the LED;

5 LEDs with internal flashing capability may have higher forward voltages than above;

6 Always use manufacturer's data if available.

7 below is for 2 Pin/Leg LED connections