KSR Subminiature SMT Tact Switches C&K Switches KSR Subminiature SMT Tact Switches save PCB space and offer an actuation force of 4.5N (±25%), a rubber actuator, and a G termination. Sealed to IP50, the KSR series switches are normally open with gullwing terminals for SMT. C&K Switches KSR series tact switches are ideal for automotive, cellular phones and accessories, industrial electronics, computers, and network equipment. The components are RoHS Compliant.