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Text Box: Reading a Table of Technical Data for LEDs Suppliers' catalogues usually include tables of technical data for components such as LEDs. These tables contain a good deal of useful information in a compact form but they can be difficult to understand if you are not familiar with the abbreviations used. The table below shows typical technical data for some 5mm diameter round LEDs with “Water Clear” packages (plastic bodies). Only three columns are important and these are shown in bold.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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IF Maximum

Maximum Forward Current, forward just means with the LED connected correctly

IF Typical

This is the typical current for the most LEDs

VF Typical

Typical Forward Voltage, VL in the LED Resistor calculation

VF Range

Range for Forward Voltage

VR Maximum

Maximum Reverse Voltage

You can ignore this for LEDs connected in the correct way.

Wavelength

The peak wavelength of the light emitted, this determines the color of the LED.          ====>   nm = nanometer

Colors

IF

Maximum

IF

Typical

VF

Typical

VF

Range

VR

Maximum

Wavelength

Blue

30mA

20mA

3.2V

3.0-3.4V

10V

470nm

Green

30mA

20mA

2.8V

2.4-3.3V

30V

520nm

Orange

30mA

20mA

2.2V

1.8-2.5V

35V

615nm

Red

30mA

20mA

2.0V

1.8-2.2V

30V

660nm

Yellow

30mA

20mA

2.1V

1.9-2.2V

25V

590nm

White

30mA

20mA

3.4V

3.0-3.8V

5V

X:0.28, Y:0.28

 

 

 

 

 

 

 

InfraRed

50mA

 

1.6V

 

 

700–1200 nm

UltraViolet

35mA

 

3.5V