... button switch; CE approval fixing size:22mm or 30mm used for electrical equipment electric momentary pushbutton switch; Specifications:Contact Rating10A, 250V ACContact ... ,500VLife Expectancy(Mechanical)600,000 for AC, 250,000 for DCLife Expectancy(Electrical)300,000 for latching, 1,000,000 for momentary Mechanical Configuration:latching ...