4N28-X Overview
The 4N25 family is an Industry Standard Single Channel Phototransistor Coupler. This family includes the 4N25, 4N26, 4N27, 4N28. Each optocoupler consists of gallium arsenide infrared LED and a silicon NPN phototransistor.
4N28-X Key Features
- Isolation test voltage 5000 VRMS
- Interfaces with mon logic families
- Input-output coupling capacitance < 0.5 pF
- Industry standard dual-in-line 6-pin package


