LC1-D series AC contactors are suitable for frequency 50/60Hz, rated insulation voltage up to 1000, rated operation current 9-330A under AC-3 duty. It is mainly used for making breaking electric circuits at a long distance &for frequent starting/stopping &controlling AC Motors. It is used in combination with thermal relay to compose a magnetic motor starter. The products according with the standards such as IEC 60947-4-1 & GB 14048.4.