KSC321JLFS is a sealed tactile switch from the KSC3 series designed for surface mount applications. It features a compact 6.2 x 6.2 mm footprint with a 3.5 mm high hard actuator and IP67 sealing for protection against dust and water ingress. The switch has a momentary action function with SPST normally open contact arrangement, an operating force of 2 ± 0.4 N, and is rated for 300,000 operations. It utilizes J-bend terminations with lead-free compatible silver plating. Common applications include industrial electronics, consumer products, transportation, and medical devices where reliable tactile feedback and environmental sealing are required.