FSM4LPA is a low-profile surface-mount tactile switch from the FSM1LP series, featuring a compact 0.236" x 0.236" (6 mm x 6 mm) footprint designed for space-constrained applications. The switch utilizes copper alloy silver-clad plated contacts, a PPS case and stem, and a steel tin-plated cover, delivering robust electrical performance with a contact rating of 50 mA at 12 VDC and initial contact resistance of 100 milliohms maximum. It operates reliably across a temperature range of -20°C to +85°C with an insulation resistance of 100 megohms minimum at 100 VDC and dielectric strength of 500 VAC for 1 minute, supporting up to 100,000 mechanical cycles. The FSM4LPA is ideal for consumer electronics, industrial control panels, and portable devices where reliable tactile feedback and compact form factor are essential.