KMR221NGLFS is a microminiature surface mount tactile switch from the KMR 2 Series, designed for momentary action switching with a single-pole single-throw (SPST) normally open contact arrangement. This switch features a 2.0 N (200 grams) operating force, 0.25 mm travel, and a mechanical operating life of 200,000 cycles. It has a total height of 1.9 mm, silver contact material, no ground pin option, and gullwing terminals for SMT mounting. The switch offers IP40 protection, excellent tactile feel, and operates over a temperature range of -40°C to 85°C. Common applications include automotive systems, industrial electronics, and medical equipment where compact size and reliable tactile feedback are essential.