SG3-DA025-A2-2L Three phases Input 12-32VDC Output 48-480VAC 25A

Details of SG3-DA025-A2-2L Three phases Input 12-32VDC Output 48-480VAC Current 25A

SG3-DA025-A2-2L Three phases Input 12-32VDC Output 48-480VAC Current 25A Solid State Relay (SSR) three-phase SSR that uses DC input and AC output In this case, the Solid State Relay (SSR) operates with a DC input voltage (such as 3V, 5V, 12V or 24V DC) and an AC output voltage (such as 220V AC or 380V AC) for controlling AC-powered loads

Working Principle

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

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 10A, 20A, 30A, 40A depending on the model
• Circuit Isolation Uses opto-isolator to separate control circuit from load circuit
• No Moving Parts No moving parts make it durable and long-lasting

Applications

SSR with DC input and AC output is suitable for controlling AC loads using a DC control signal, applicable in various fields such as:

• Large electric motors (e.g., three-phase motors in factories)
• Industrial heaters such as ovens, furnaces, or heating systems
• Temperature control systems in devices requiring precise heat control
• Electric system control in automatic equipment using DC signals to turn 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.
• System heating (Heater) control can use SSR to turn on/off heaters using a DC control signal from temperature sensors or an automatic control system.

Advantages

• No wear and tear: 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

Caution

• A heat sink or cooling system must be used to prevent overheating. Random Turn-on 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-DA025-A2-2L Three phases Input 12-32VDC Output 48-480VAC Current 25A