minil pushbutton switch with sqaure shape; fixing size:10mm,12mm,16mm CE, CQC&RoHS ... square shape; Specification:Contact Rating3A, 250V ACContact Resistance ≤50mΩInsulation Resistance≥1,000mΩDielectric Strength1,500VLife Expectancy(Mechanical)25, ... )100,000 for latching, 1,000,000 for momentary Mechanical Configuration:latching&momentaryPushbutton Headround, mushroom, square, rectangular big square ...