SG1-RA15-A2 Single Phase Input VR 0…1M Ohm Output 48-480VAC Current 15A Phase

Details of SG1-RA15-A2 Single phases Input VR 0…1M Ohm Output 48-480VAC Current 15A Pha

SG1-RA15-A2 Single phases Input VR 0…1M Ohm Output 48-480VAC Current 15A Pha Solid State Relay (SSR Single Phase) controlled by Potentiometer and has Phase Control output. It is a device 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 electricity: 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 on early) → more energy output → higher heat/speed, similar to dimming an incandescent light bulb or controlling heater temperature.

Specifications

• Electrical Type: 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
• Loading Supported: 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 – detailed heat adjustment
• Voltage-controlled Speed Control Fans

Safety Recommendations

• Must have a heatsink or cooling system
• Avoid overloading the SSR
• Beware of touching SSR output – high voltage present when circuit is open

Technical Information SG1-RA15-A2 Single phases Input VR 0…1M Ohm Output 48-480VAC Current 15A Pha