KMR6 Microminiature SMT Tactile Switches C&K Switches KMR6 Series Microminiature SMT Tactile Switches are watertight and meet IP67 requirements. KMR6 tact switches feature no ground pin and an excellent tactile feel. Both standard and long-life versions are available and offer ultra-low current capabilities. C&K Components KMR6 switches are designed for automotive, medical, consumer, and industrial applications.