Autonics SRH3-4450 Three-Phase Solid State Relay, Panel Mount SSR

The Autonics SRH3-4450 is a three-phase solid state relay (SSR) with an integrated heatsink, designed for reliable switching of three-phase AC loads. It supports a 90–240 VAC input/control voltage, a 48–480 VAC load voltage, and a 50 A rated load current. This model uses zero-cross turn-on switching, helping reduce electrical noise and switching stress during operation. It is suitable for heater control, industrial automation panels, and other three-phase AC load switching applications.

Features:

Three-phase solid state relay for AC load control
Integrated heatsink design
Rated load current: 50 A
Rated load voltage: 48–480 VAC
Input/control voltage: 90–240 VAC
Zero-cross turn-on function for reduced electrical noise
High dielectric strength: 4,000 VAC
Panel mount / DIN rail mounting type
Screw terminal connection
Suitable for industrial heater control and three-phase load switching
Ambient operating temperature: approximately -30 to 80°C, depending on derating conditions