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AJMRTC 4000W SCR AC voltage regulator is a high-power electronic control module used for stepless adjustment of AC voltage from 0 to 220V. It can serve as a motor speed controller or light dimmer to adjust the output power of connected equipment. Equipped with temperature insurance protection, the module will trigger protection when overheating occurs to avoid burnout and improve safety. This SCR regulator features simple wiring and strong load capacity. It is widely applied to light dimming, fan speed regulation, heating tube power control, small AC motor speed adjustment and various power regulation DIY projects.