CJX1 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 started/stopping & with thermal relay to compose a magnetic motor starter, so The products accords with standards as IEC6 0947-4-&GB14048.4  http://www.yingselectric.com