KSC621JLFS is a sealed tactile switch from the KSC6 Series designed for surface mount applications. It features a hard actuator with a total height of 7.7 mm, an operating force of 1.7 ± 0.5 N, and a travel distance of 0.4 ± 0.2 mm. The switch provides IP67 sealing for protection against dust and water ingress, with J bend terminals for SMT and lead-free compatible silver-plated contacts. It offers a momentary action with SPST normally open contact arrangement and an operating life of 300,000 operations. Common applications include automotive, cellular phones, industrial electronics, network infrastructure, and elevator systems.