The YTS1T0102AUJ00 is a SMD (Surface Mount Device) tactile switch manufactured by YIYUAN. It is compliant with the European RoHS Directive and is a single-pole, single-throw (SPST) switch. It has a 100mA rated current, a 0.4VA max. power rating, and an operating temperature range of -25°C to +85°C. Additionally, the switch has an electrical life of 500,000 cycles, a contact resistance of 200mO max., a mechanical life of 1 million cycles, and an initial contact force of 187.5gf +/- 10gf.