OSG5DA7331A-12V is part of Optosupply’s Optoisolator series, designed to provide electrical isolation between two circuits that allow signals to be transmitted between them. The OSG5DA7331A-12V is a 5mm plastic housing, DIP optocoupler, with an output device rated at 1A and 12VDC. It also features low saturation voltage, high isolation voltage, high common mode transient immunity, and quick switching speed.