SG3-AAR040-A2 Three Phase Input 80-280VAC Output 48-480VAC 40ARandom

Details of SG3-AAR040-A2 Three phases Input 80-280VAC Output 48-480VAC Current 40A Random

SG3-AAR040-A2 Three phases Input 80-280VAC Output 48-480VAC Current 40A Random Solid State Relay (SSR) Three-phase SSR

How It Works

Solid State Relay (SSR) is an electronic device that functions as an electrical switch, controlling the on-off circuit without any moving parts like a mechanical relay (Electromechanical Relay - EMR). It uses semiconductor properties such as Triac, SCR, Opto-isolator to control the flow of electric current.

• Input (Control): Uses AC voltage signal to trigger internal circuits, e.g., 90–280VAC
• Output (Load): Works with AC-powered loads such as motors, heaters, etc.
• Random Turn-on: Refers to circuit opening immediately upon control signal without waiting for zero crossing — suitable for loads requiring fast response like inductive load (motors)

Features and Details

• Type of Control Voltage (Input) AC 90–280V or AC 100–240V
• Type of Load Voltage (Output) AC 24–480V or AC 24–600V
• Current Rating 10A, 25A, 40A, 60A depending on model
• Random Turn-on Output Operation (immediate turn-on without waiting for zero crossing)
• Circuit Isolation Uses Opto-isolator to isolate control circuit from load circuit
• Long Service Life No wear and tear or sparking parts

Applications

The three-phase SSR is suitable for high-power loads, especially in industrial electrical systems such as:

• Large heaters (Heaters)
• Three-phase motors (Three-phase Motors)
• Furnaces, Industrial Ovens
• PID temperature control systems
• Large lighting systems requiring fast control

Advantages

• No noise during operation
• Rapid switching response in milliseconds
• No sparking or wear and tear
• Durable, long-lasting use

Cautions

• Must have a heat sink or cooling system
• Not tolerant to overcurrent like mechanical relays; should have circuit breakers or protective devices
• Random Turn-on may not be suitable for certain types of loads (consider zero crossing for some load types)

Tech Data SG3-AAR040-A2 Three phases Input 80-280VAC Output 48-480VAC Current 40A Random