... AC Use Life: 10,000 cycles Customized Switches are available Fan Push Button Switches/ Keyboard Switches (3800-4D-19# ) Technical Parameter Electrical Rating ... Terminal Spring: stainless steel Stationary terminal: Copper alloy Spring: Steel L Push Spring: Steel Certifications: CE, CQC, UL, TUV, CB, ROHS ... Drawings: Different Button Caps as below: Push Button Switch of Fan(3800-4D-19#)