The Vishay Phototransistor has a GaAs infrared emitting diode emitter, which is optically coupled to a silicon planar phototransistor detector, and is incorporated in a 4 pin 100 mil lead pitch miniflat package. It features a high current transfer ratio with low input current, low coupling capacitance, and high isolation voltage. These coupling devices are designed for signal transmission between two electrically separated circuits.

Isolation test voltage, 3750 VRMS
Low saturation voltage
Fast switching times
Low coupling capacitance