1. APPLICATION CJXI (3TB 3TF) series AC contactors are suitable for frequency 50/60HZ, rated insulation voltage up to 1000V, rated operation current 9-475A under AC-3 duty. It is mainly used for making/breaking electric circuits at a long distance & for frequent starting/stopping & with when thermal relay to compose a magnetic motor starter, so. The products accords with standards as IEC60947-4-1&GB14048.4