The SPST, Off-(On), Momentary TL4100 and TL4105 tact switches exploit a unique board-edge mounting design to accommodate handheld devices. Specs include a life expectancy around 1,000,000 cycles, a contact rating of 50 mA at 12 Vdc, contact resistances of 100 mΩ (TL4100) and 1Ω (TL4105), insulation resistance of 100 MΩ at 500 Vdc, dielectric strength of 250 Vac for one minute, and an operating temperature from -40°C to +85°C. E-SWITCH INC., Minneapolis, MN. (800) 867-2717.