KMR621NGLFS is a microminiature surface-mount tactile switch from the KMR 6 Series, featuring IP67 watertight protection and top actuation. It provides momentary action with a SPST normally open (1 make) contact arrangement, an operating force of 2.0 N (200 grams) ± 0.50, and a travel of 0.25 mm ± 0.1. The switch offers a mechanical operating life of 200,000 cycles and features gullwing terminals for SMT mounting, with a total height of 1.9 mm. With no ground pin, ultra low current capabilities, and excellent tactile feel, this switch is well-suited for automotive, medical, consumer, and industrial applications requiring reliable, compact switching solutions.