The HP series tactile switches employ lead-free construction within the switch, and their packaging materials also meet all RoHS requirements. Contacts are either gold or silver: gold contacts handle 28 Vac/dc maximum and silver contacts withstand 3 VAdc maximum. The circuit is normally open, SPST OFF, momentary ON. Available in through-hole and surface-mount models, through-hole models have crimped terminals while surface-mount switches feature gull wing terminals. Both types include insert-molded terminals to lock out flux, solvents, and other contaminants. For more details and prices, call NKK SWITCHES, Scottsdale, AZ. (480) 991-0942.