SG1-RA25-A1 Single phase Input VR 0…500K Ohms Output 24-280VAC Current 25A P

Details of SG1-RA25-A1 Single phases Input VR 0…500K [ohms] Output 24-280VAC Current 25A P

SG1-RA25-A1 Single phases Input VR 0…500K [ohms] Output 24-280VAC Current 25A P 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 load, such as heaters or motors. The details can be explained as follows:

Working Principle

Phase Control SSR works by delaying the Triac opening timing within each half cycle of AC electricity: AC electricity has a sine wave (50/60Hz) characteristic. The SSR input is connected to Potentiometer which sets the "phase angle" for current delivery start.
The longer the delay (opening later after zero crossing), the less energy output → lower heat/speed. If short delay (open early) → more energy output → higher heat/speed, similar to dimming an incandescent bulb or controlling heater temperature.

Specifications

• Electricity 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
• Suitable Load: Resistive (heaters), Inductive (small motors)
• No click sound: Silent operation
• Fast 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 variable-speed fans

Safety Recommendations

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

Technical Data SG1-RA25-A1 Single phases Input VR 0…500K [ohms] Output 24-280VAC Current 25A P