MOC3051 IC FSC Optocoupler Triac out IC

The MOC3051 is an optoisolator with a phototriac output, designed to safely interface low-voltage digital control signals with high-voltage AC loads. It consists of an infrared LED input and a light-activated phototriac output, offering galvanic isolation between the control side and the AC side.

Unlike the MOC304x series, the MOC305x series does not include zero-cross detection, allowing the triac to fire immediately when triggered, making it suitable for phase-control applications such as dimming or motor speed control.

Applications

• AC lamp dimmers
• Fan/motor speed controllers
• AC heater control with TRIAC
• Solid-state relays
• Phase angle control circuits
• AC switching and power regulation
• Home appliances and industrial control
• PWM-based AC load control