Carpo Electroniks Ltd. Manufactures Tact Switches. Carpo Electroniks Ltd. Is an ISO 9002 certified company. The specifications of Tact Switches are as follows: Rating: DC 12V 50mA Contact: Mechanical Contact Travel: 0.25 + 0.1 m/m Operating Force: 160 + 30gf Contact Resistance: 100m?Max. Life: 100,000 Cycles Min.