SCR-3 120A 380V Three-Phase Thyristor Power Controller

Product Description:
The SoftStarterPro SCR-3 is a three-phase thyristor power controller for industrial power regulation and heating applications. It supports 4-20mA, 0-5Vdc, 0-10Vdc, 1-5Vdc, and 0-10mA control signals, plus manual potentiometer control, for direct integration with PLC and PID temperature controllers. Using fully isolated, phase-angle control with a bidirectional thyristor design, it delivers fast, stable power adjustment without the wear associated with relays or contactors. Green POWER and red RUN LED indicators provide real-time operating status feedback.

Key Features:

• Control Signal Compatibility: 4-20mA, 0-5Vdc, 0-10Vdc, 1-5Vdc, 0-10mA, 10kΩ manual potentiometer
• Bidirectional Thyristor Design: Enables AC power control in both half-cycles
• Phase-Angle Control: Precise, continuous power regulation
• Semiconductor-Based Switching: No mechanical contacts, fast response, no relay wear
• LED Status Indication: Green POWER indicator, Red RUN indicator (steady or intermittent flashing indicates normal operation)
• Fully Isolated Design: Complete separation between control circuit and power circuit
• CE Certified

General Technical Parameters:

Application:

• Industrial Electric Heaters and Heating Elements
• Ovens and Furnaces
• Plastic and Rubber Heating Equipment
• Packaging and Sealing Machinery

Note: Not recommended for inductive loads (transformers, motors). External heat sink required — use recommended 9225 heat sink with forced-air cooling for this current rating. Test with a small resistive load (e.g. incandescent lamp) before connecting the actual load. Two control modes cannot be used simultaneously.