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

The Onsemi MOC3063SM Optocoupler, Triac Output, 6-Pin SMD is a zero-crossing TRIAC driver output optocoupler for reliable and safe AC power control, with 7.5kV isolation.

Overview

The MOC3063SM integrates a gallium arsenide (GaAs) infrared emitting diode with a monolithic silicon detector, creating an optical isolation barrier. This barrier electrically separates low-voltage logic control circuits from high-voltage AC power lines (115/240VAC), supporting safety and helping to protect sensitive components from voltage spikes and noise.

Zero-Voltage Crossing

The device features zero-voltage crossing functionality, so the connected TRIAC is triggered only when the AC voltage crosses zero. This helps minimise inrush current and electrical noise (EMI), which can benefit connected loads such as motors, solenoids, and lamps, and supports cleaner power lines in sensitive electronic environments. A high dv/dt rating of 600V/µs provides immunity to false triggering.

Applications

Designed to simplify the logic control of mains power, this optocoupler is suited to solid-state relays, motor drives, and industrial automation systems. It provides a simple, isolated interface for microcontrollers or logic circuits to switch AC loads. The 7.5kV isolation voltage supports demanding applications.

• 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

Package

The device is housed in a compact six-pin Surface Mount Device (SMD) DIP package, designed for automated PCB assembly and to save board space in modern electronics.