The USAKRO UK-B0228-G13-SP25 is a tactile switch with SMD (Surface Mount Device) technology and RoHS (Restriction on Hazardous Substances) compliance, designed for use in surface mount PCB assemblies. The switch has an operating voltage of 4.5V DC and a maximum current rating of 50mA. Tactile switches are momentary action switches with a short circuit, enabling quick switching between two signals. The switch has an operating temperature range of -20°C to +85°C, and a storage temperature range of -20°C to +100°C. It is typically used in a wide variety of industrial, automotive, and consumer electronic products, including housing switches for control panels, security devices, and more.