C&K Switches RK Microminiature SMT Tactile Switches are top-actuated tact switches with a range of actuation forces (160gf to 540gf) and up to 1 million life cycles. These components feature a hard actuator in a low-profile, microminiature package with a 4.2mm or 4.5mm length, 3.2mm or 4.5mm width, and 0.55mm or 2.5mm height. C&K Switches RK Microminiature SMT Tactile Switches are ideal for applications requiring high density in a limited space, including automotive key fobs, navigation, and medical devices.