Y35A25210FPLFS is a subminiature tactile switch from the KSR Long Life series designed for surface-mount technology (SMT) applications with a 200,000-cycle operating life. The switch features a soft rubber actuator, gullwing terminations for SMT compatibility, and is available in both silver and gold contact material options. It operates with a momentary action function in a normally open contact arrangement, with an IP 50 sealed design and RoHS compliance. The switch supports multiple actuation forces ranging from 1.8 N to 4.5 N, with operating temperatures from -40°C to 125°C depending on contact material selection. Typical applications include automotive systems, medical equipment, and industrial electronics where reliable tactile feedback and long operational life are required.