... we can make it unfragile. CJ12 Series AC Contactor1,Frequency AC 50/60Hz, voltage up to 380V, ... frequently starting 4,stopping and inverse CJ12 series AC contactors (contactor for short below) is ... circuit, frequently starting, stopping, reversing and controlling AC motor in the power system with frequency 50Hz ... U shape electromagnet and coil. Armature and yoke have shocks to decrease the impact stress ...