ALPS Electric co., LTD. Tact Switch SKHK Products Line Model Operation force Travel Ratings (max.) Lifetime (5mA 5V DC) Initial contact resistance Stem color Case color SKHKAA 1.274N{130gf} 0.3mm 50mA 12V DC 100Ω max. Light gray Black Dimensions Circuit diagram Printed circuit board mounting hole dimensions  (When viewed from the  switch mounting face) It is suggested to use a P.C.Board  of 1.6mm thick.