C & K Nano-Miniature Surface Mount Tactile Switch IP54 0.65 mm Actuator Top, SPST 50mA 32 V AC/DC

C & K KMT221NG HF LFS is a nano-miniature surface mount tactile switch designed for precision and compact applications. Featuring a top actuation style with a 0.65 mm actuator length and a SPST contact configuration, this switch offers reliable momentary operation with a contact rating of 50mA at 32V AC and DC.

Its extremely small footprint, measuring just 3 mm in length, 2.6 mm in width, and a height of 0.65 mm, makes it suitable for space-limited devices such as hearing aids, Bluetooth headsets, mobile phones, and MP3 accessories. The integrated actuator provides the smallest thickness available in this switch series, enhancing compactness without compromising mechanical endurance.

The switch's IP54 rating provides protection against dust ingress and water splashes, making it durable in various environmental conditions. It operates reliably from -40°C up to 85°C with a modest operating force of 1.6 Newtons, supporting efficient tactile feedback with minimal user effort. Its mechanical life extends to 150,000 operations, ensuring longevity in demanding electronic applications.

The switch is surface mount type with a top-style actuator for compact PCB mounting. SPST (Single Pole Single Throw) contact configuration enables simple on/off functionality. Mechanical durability of 150,000 actuations supports long-term product lifecycle.

Low operating force at 1.6N facilitates user-friendly tactile response. IP54 rating ensures resistance to dust and water exposure. Designed primarily for miniature electronic devices such as hearing aids, mobile phones, MP3 players, and headsets.

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