LW 30 series isolation switches applied to circuits of AC 50Hz with working voltage up to 440V and ratedworking current up to 100A;It is suitable to control :air-conditioner, water pump and ventilating equipments, and AC Motorswith small power;It has 7 current ratings: 20A,25A,32A,40A,63A,80A,and 100A;It has the finger protection terminals,which offers an extra advantage;It has larger insulation distance, quick disconnecting response .And is a good choice For DC circuits, It has additional contact which enable us to install the contact separetely.It comply with Standard lEC60947-3.