The TS-1091S-A10B2-C1D2 Tactile Switch manufactured by Yuandi is a SPST, or Single Pole Single Throw, electrical switch. It is a 4.5 mm round button, with a black finish, and its operating voltage is 12V. The rated electrical current is 50 mA and the working temperature range is -25?~+85?. Its contact resistance is 100MO, its life expectancy is 100,000 cycles and it weighs 180gf±30gf. It is an SMD, or Surface Mount Device, switch, compliant with RoHS standards.