SR2/SR3 Series - Three-Phase Solid State Relays (Detachable Heatsink Type)

SR2/SR3 Series Three-Phase Solid State Relays (Detachable Heatsink Type)

The SR2/3 series three-phase solid state relays are detachable heatsink types, which can be used with various heatsinks. The solid state relays can control 2-phase or 3-phase loads and feature two mounting hole types for compatibility with various types of heatsinks. The series also features alarm output for safe operation, and are also available in 24 VAC low voltage models. Select models feature high dielectric strength of up to 4000 VAC.

Alarm function Detachable Heatsink Type High heat dissipation efficienc Three-Phase Solid State Relays Two mounting hole types and sizes

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Main features

Two mounting hole types and sizes
Alarm function (overheating) : Alarm output indicator (red LED), disconnect standard output, alarm output
High dielectric strength : 4000VAC (select models)
Rated input voltage : 4-30VDC, 24VAC, 90-240VAC
Rated load voltage : 24-240VAC, 48-480VAC
Rated load voltage : 24-240VAC, 48-480VAC
Rated load current : 15A, 30A, 40A, 50A, 75A
High heat dissipation efficiency with ceramic PCB and integrated heatsink
Zero cross turn-on and random turn-on models available
Input indicator (green LED)

Two Mounting Hole Types
Alarm Output
Low Voltage Input
Dielectric Strength (Select Models)
Screw Mount
DIN Rail Mount

Two Mounting Hole Types

Two different mounting holes types and sizes allow flexible installation and mounting on various types of heatsinks.

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Built-In Alarm (Overheating) Function

In case of overheating due to product damage or overcurrent, the alarm output turns on and the red LED indicator provides safer operation for users.

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Low Voltage Models Available/Dielectric Strength Up to 4000VAC

24VAC low voltage models are available for flexible application in diverse settings. Select models feature high dielectric strength of up to 4000VAC.

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Zero Cross Turn-On/Random Turn-On Models Available

Zero Cross Turn-On

The relay switches ON/OFF when the voltage reaches the zero-crossing point of the sine wave. This method minimizes surge current and inrush current, and is ideal for most common industrial loads.
Random Turn-On

The relay opens or turns on immediately when the input signal is applied and turns off when the signal is removed. This method allows phase-control applications requiring precise control of power.