The MOC3051 is a 6-pin DIP random-phase optoisolator triac driver with a 600-volt peak blocking rating. It pairs an infrared LED with a non-zero-crossing silicon bilateral AC switch to safely link low-voltage logic circuits to 115V or 240V AC power lines. You can review the complete technical specifications in the Onsemi MOC3051M Datasheet.
Main Features
- Random-phase switching: Triggers at any point on an AC sine wave, not just at zero crossings.
- High voltage peak: Blocks up to 600 V peak off-state voltage.
- Strong isolation: Separates low-voltage logic from dangerous AC mains.
- Inductive load support: High static dv/dt capability handles motors and solenoids well.
Common Uses
- AC motor speed control
- Lighting dimmers and phase control
- Solenoid and valve drivers
- Solid-state relays
