SG3-DA075-A2-2L Three phases Input 12-32VDC Output 48-480VAC 75A

Details of SG3-DA075-A2-2L Three phases Input 12-32VDC Output 48-480VAC Current 75A

SG3-DA075-A2-2L Three-phase Input 12-32VDC Output 48-480VAC Current 75A Solid State Relay (SSR) is a three-phase SSR that uses DC input and AC output. In this case, the Solid State Relay (SSR) operates with an input of DC voltage (e.g., 3V, 5V, 12V or 24V DC) and an output of AC voltage (e.g., 220V AC or 380V AC) for controlling loads that use AC power.

Working Principle

• Input (DC Control Signal): The DC Input triggers the SSR through a circuit with an Opto-isolator or LED, which sends a signal to the control circuit of the SSR. When a suitable DC signal reaches the input, the SSR opens the opto-isolator circuit that separates the power signals of the control circuit from those of the load (AC power). The Input may have DC voltage in ranges such as 3V, 5V, 12V or 24V depending on the SSR model.
• Output (AC Load Control): When the SSR receives a signal from the input, it controls the circuit of AC-powered loads such as three-phase motors, heaters, or industrial electricity. In this operation, the SSR may work in Random Turn-on or Zero Crossing mode depending on its design. For DC Input models, immediate circuit opening (Random Turn-on) is common.

Features and Details

• Input (Control): DC (3V, 5V, 12V, 24V)
• Output (Load): AC (220V, 380V, 480V)
• Circuit Opening Mode: Random Turn-on or Zero Crossing (depending on design)
• Current Rating: Supports 10A, 20A, 30A, 40A depending on the model
• Isolation: Uses Opto-isolator to separate control circuit from load circuit
• No Moving Parts: No moving parts make it durable and long-lasting

Applications

The SSR with DC Input and AC Output is suitable for controlling AC loads using a DC control signal. It finds applications in various fields such as:

• Large electric motors (e.g., three-phase motors in factories)
• Industrial heaters, like ovens, smelters, or heating systems
• Temperature control systems requiring precise heat regulation
• Electric system controls in automatic devices using DC signals to switch AC loads on/off

Usage Examples:

• The SSR can be used to control the operation of three-phase AC motors by providing a DC signal from PLC or microcontrollers.
• To control heating systems (Heater), SSRs can be utilized to turn heaters on and off using a DC control signal from temperature sensors or an automatic control system.

Advantages

• No Wear: Since there are no moving parts like in traditional relays.
• Precise Control: Opening/closing is fast and highly accurate.
• Durable: Longer lifespan compared to magnetic relay types.

Cautions

• A heatsink or cooling system must be used to prevent overheating and random turn-on, which may cause issues with certain loads (e.g., heavily loaded motors).
• Overcurrent must be avoided as SSRs might open the circuit upon receiving a DC signal even if the current does not match load requirements.

Tech Data SG3-DA075-A2-2L Three phases Input 12-32VDC Output 48-480VAC Current 75A