SG3-AAR075-A2 Three Phase Input 80-280VAC Output 48-480VAC 75A Random

Details of SG3-AAR075-A2 Three phases Input 80-280VAC Output 48-480VAC Current 75ARandom

SG3-AAR075-A2 Three phases Input 80-280VAC Output 48-480VAC Current 75ARandom Solid State Relay (SSR) three-phase (Three-phase SSR)

How it Works

Solid State Relay (SSR) is an electronic device that functions as an electrical switch, controlling the opening and closing of circuits without any moving parts like mechanical relays (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 circuitry, e.g., 90–280VAC
• Output (Load): Works with AC-powered loads such as motors, heaters, etc.
• Random Turn-on: Refers to the ability to turn on the circuit immediately upon receiving a control signal without waiting for zero crossing — suitable for loads requiring fast response, such as 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 the model
• Random Turn-on Output Operation (turns on immediately without waiting for zero crossing)
• Circuit Isolation Uses Opto-isolator to isolate control circuit from load circuit
• Durability Long-lasting with no wear and tear or sparking components

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
• Bright large lighting systems requiring fast control

Advantages

• No noise during operation
• Rapid switching with millisecond response time
• No sparking or wear and tear
• Durable, long-lasting use

Cautions

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

Tech Data SG3-AAR075-A2 Three phases Input 80-280VAC Output 48-480VAC Current 75ARandom