electric emergency push button switch; CE approval fixing size:22mm or 30mm used for electrical equipment electric momentary pushbutton switch; Specifications:Contact Rating10A, 250V ... 250,000 for DCLife Expectancy(Electrical)300,000 for latching, 1,000,000 for momentary Mechanical Configuration:latching&momentaryPushbutton Headround ... ,380V AC 110V, 220V, 380V electric emergency push button switch