The SCR power controller (Thyristor power controller) is a core device for industrial heating and precise temperature control. By receiving low-voltage control signals (such as 4-20mA) from temperature control meters or PLCs, it uses phase-angle control or zero-crossing (burst firing) control technology to precisely adjust the conduction angle or duty cycle of thyristors, thereby achieving stepless voltage regulation and power control for high-power alternating current (AC). Featuring fast response, high temperature control accuracy, and zero mechanical wear, this equipment is widely used in demanding thermal control applications such as industrial electric furnaces, plastics machinery, glass melting, and semiconductor manufacturing.