SG1-RA50-A2 Single phase Input VR 0…1M Ohm Output 48-480VAC Current 50A Phase

Details of SG1-RA50-A2 Single Phase Input VR 0…1M Ohm Output 48-480VAC Current 50A Pha

SG1-RA50-A2 Single phase Input VR 0…1M Ohm Output 48-480VAC Current 50A Pha Solid State Relay (SSR Single Phase) controlled by Potentiometer and has a Phase Control output. It is used to control AC voltage by adjusting the time window for current flow through the load, such as heaters or motors. The details can be explained as follows:

Working Principle

Phase Control SSR works by delaying the Triac switching within each half cycle of AC power: AC power has a sine wave (50/60Hz) characteristic. The SSR input is connected to a Potentiometer which sets the "phase angle" at which current starts flowing. The longer the delay (the later it switches on after zero crossing), the less energy is output → lower heat/speed. If there's little delay (switches early) → more energy output → higher heat/speed, similar to dimming an incandescent light bulb or controlling heater temperature.

Specifications

• Type of Power: AC Single Phase (e.g., 220VAC)
• Controlled by: Potentiometer (generally 0–100kΩ)
• Phase Control: Phase Angle Control (0–180°)
• Output: Triac type → No mechanical contact
• Suitable Load: Resistive (heaters), Inductive (small motors)
• No Click Sound: Silent operation
• Rapid Response: No delay from mechanical parts
• General Applications:
• Heaters – Precise temperature control
• Small AC Motors – Speed control
• Light Dimmers – Control brightness of incandescent/halogen bulbs
• Industrial Ovens – Fine-tune heating
• Voltage-controlled speed fans

Safety Recommendations

• A heat sink or cooling system should be used.
• Do not exceed the SSR load rating.
• Be cautious of output contact – High voltage is present continuously when circuit is open.

Tech Data SG1-RA50-A2 Single Phase Input VR 0…1M Ohm Output 48-480VAC Current 50A Pha