KMR2 Microminiature SMT Tactile Switches C&K Switches KMR2 Microminiature SMT Tactile Switches are small footprint, 1.9mm height top actuated switches with four actuation forces and excellent tactile feel. KMR2 tact switches feature ultra low current capabilities and IP40 protection. This C&K Switches series offers Gullwing termination and is ideal for use in automotive, industrial electronics, and medical equipment applications.