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Description 

The 4N28 is an Industry Standard Single Channel Phototransistor Coupler. This family includes the 4N25, 4N26, 4N27 and 4N28. Each OPTOCOUPLER consists of gallium arsenide infrared LED and a silicon NPN phototransistor. In this chip the primary circuits and secondary circuits are isolated electrically. The pair of diode and phototransistor is there to provide optical trigger mechanism between the primary and secondary circuits.

Specifications

AttributeValue
Mounting TypeThrough Hole
Output DevicePhototransistor
Maximum Forward Voltage1.5V
Number of Channels1
Number of Pins6
Package TypeDIP
Input Current TypeDC
Typical Rise Time2µs
Maximum Input Current60 mA
Isolation Voltage5 kVrms
Maximum Current Transfer Ratio30%
Typical Fall Time2µs

4N28 OPTOCOUPLER OUTPUT: 70V, 50mA

USh1,500Price