The type is 50RIA, the current is 50A, the voltage is 1200V, and the appearance is spiral. Compact size, high efficiency and long service life. Widely applied in AC and DC motor speed control systems, power adjustment systems and servo systems. In automatic control systems, it can serve as high-power drive equipment to control high-power devices via low-power controls. Excellent workmanship, ideal for replacing old or damaged ones. Suitable for phase control applications in converters, lighting circuits, battery power supplies, regulated power supplies as well as speed and control circuits.