ONSEMI MOC3063SM Optocoupler, Triac Output, 6-Pin SMD, 7.5kV, 600V

The ONSEMI MOC3063SM is a sophisticated zero-crossing TRIAC driver output optocoupler engineered for reliable and safe AC power control. It integrates a gallium arsenide (GaAs) infrared emitting diode with a monolithic silicon detector, creating a robust optical isolation barrier. This key design feature electrically separates low-voltage logic control circuits from high-voltage AC power lines (115/240VAC), enhancing safety and protecting sensitive components from voltage spikes and noise.

A defining characteristic of this device is its zero-voltage crossing functionality. This intelligent circuit ensures the connected TRIAC is only triggered when the AC voltage crosses zero, minimising inrush current and electrical noise (EMI). This is critical for prolonging the lifespan of connected loads like motors, solenoids, and lamps, and for maintaining clean power lines in sensitive electronic environments. The device guarantees a high immunity to false triggering with a high dv/dt rating of 600V/µs.

Key Applications & Benefits

Designed to simplify the logic control of mains power, this optocoupler is an essential component in creating solid-state relays, motor drives, and industrial automation systems. It provides a simple, isolated interface for microcontrollers or logic circuits to safely switch AC loads. Its high isolation voltage of 7.5kV ensures maximum safety and compliance in demanding applications.

Typical uses include:

• Isolated AC switching in consumer appliances and white goods.
• Speed and direction control in AC motor drives.
• Industrial control systems for operating solenoids, contactors, and actuators.
• Dimmable and switched lighting controls, including solid-state lighting ballasts.

Housed in a compact, six-pin Surface Mount Device (SMD) DIP package, it is designed for automated PCB assembly, saving valuable board space in modern electronics. The robust build,