Optoisolator Zero-Crossing TRIAC Driver – 6-Pin DIP

Reliable Zero-Cross Triac Optoisolator for AC Load Control

This zero-crossing TRIAC driver optoisolator in a standard 6-pin DIP package is designed for precise solid-state switching of AC loads. By integrating a gallium arsenide infrared emitting diode optically coupled to a silicon detector with a TRIAC driver, it provides effective isolation and low-noise switching exactly at the AC zero-cross point.

Key Features and Technical Data

• 6-pin Dual Inline Package (DIP) for easy PCB mounting and reliable connections.
• Zero-crossing detection ensures low EMI, minimal inrush current, and reduced electrical noise during AC load switching.
• Optical isolation between input and output for enhanced safety in circuits controlling AC mains power.

Typical Applications

• Solid-state relays (SSRs) for controlling AC loads without mechanical contacts
• Lighting dimmers and smart AC load controllers requiring low-noise operation
• Industrial and process automation circuits utilizing AC switching with electrical isolation

Usage Notes

• Each package contains 1 optoisolator TRIAC driver (NTE3049 / OPTOISOLATOR/TRIAC)
• For use in PCB-based AC load interface designs where zero-cross switching and galvanic isolation are critical

This part is the equivalent replacement for the following:

ECG3049, M0C3030, M0C3031, MCP3030, MCP3031, MOC3030, MOC3031, MOC3032 (May not be an exact mechanical or electrical equivalent. However, it will provide an acceptable substitute in the majority of typical applications.), NTE3049, OPI3030, OPI3031, OPI3032 (May not be an exact mechanical or electrical equivalent. However, it will provide an acceptable substitute in the majority of typical applications.), SK2049, SK2049/3049, TLP3031, TLP3032