KMT0 Tactile Switches C&K Switches KMT0 Tactile Switches are designed for consumer, wearables, and medical applications. The nano-miniature SMT top actuated switches are IP68 rated sealing offers functionality under water for a minimum of 5 hours at a depth of 2 meters. The series features a 3.0mm x 2.06mm footprint, ultra low current capabilities, and a lifespan of more than 300,000 electrical and mechanical cycles. The KMT0 switches applications include smoke and CO detectors, bluetooth headsets, and hearing aids.