SDDH Waterproof Snap-Action Switch Alps Alpine SDDH Waterproof Snap-Action Switch offers IP68 water resistance to withstand submerged environments. The switch features a broad current rating range of 10mA to 4.5A. Insulation is improved with 9.2mm pitch #187 terminal tabs. Alps Alpine SDDH Waterproof Snap-Action Switch is designed for use in power switching/detection devices in marine, agricultural, and industrial applications as well as in equipment requiring high water resistance.