The Vishay optocoupler consists of a GaAs IRLED optically coupled to a photosensitive zero crossing TRIAC packaged in a board space saving tiny flat SOP-4 package. This device isolates low-voltage logic from 120 VAC, 240 VAC, and 380 VAC lines to control resistive, inductive or capacitive loads including motors, solenoids, high current thyristors or TRIAC and relays.

Zero voltage crossing detector
High input sensitivity