General description AC 220V 4000W SCR Voltage Regulator is designed for effective control of voltage in various applications, including motor fan speed control and light dimming. It features a high-performance SCR as the internal chip, ensuring reliable operation. Technical specifications Input Voltage: AC 220V Maximum Power: 4000W (under ohmic load) Output Type: AC Minimum Load Requirement: 20W for accurate voltage measurement Power under Inductive Load: 1/3 of the ohmic load Other information Thick metal shell for high temperature resistance and durability Stepless voltage adjustment via rotary knob Zero hysteresis and zero delay for fast response Must be grounded safely during use