3TF series AC contactors AC 50Hz or 60Hz, rated insulation voltage 690-1000V, the use of category AC-3 rated working voltage of 380V, rated current of 9A-400A, mainly for long distance breaking circuit switched and purposes, for control of AC motor starting, stopping and reversing. Meet IEC947, VDE0660, GB14048 standards. Advantages of safety performance is good, is not exposed conductive parts; small size, light weight, arc chute materials used unsaturated resin, arc resistance is good, not broken; interrupter was closed, arcing distance is small, can reduce the electrical box size; the main contact system unique structure, a small contact wear, electrical life expectancy has increased; solenoid reliable, less wear and tear, noise, and possessed a high mechanical strength; operating frequency and control of high capacity; 3TF30-35 Series Auxiliary contact blocks can be applied; SIGUT-Siemens patent termination method, easy connection, solid contact with high reliability, strong anti-vibration, security is good.