electric emergency push button switch; CE approval fixing size:22mm or 30mm used for ... ≥1,000mΩDielectric Strength2,500VLife Expectancy(Mechanical)600,000 for AC, 250,000 for DCLife Expectancy(Electrical)300,000 for latching ... Voltage DC 6V,12V,24V,36V,48V, 110V,220V,380V AC 110V, 220V, 380V electric emergency push button switch