The USAKRO UK-B0227G50-SP25Y Tactile Switches with SPST 6.00mm x 3.50mm 5.00mm, 50mA @ 12VDC SMD RoHS is a type of surface-mount device (SMD) tactile switch used in various electronic devices, including automotive and telecommunications components. The switch is constructed of a conductive material, such as gold, silver, brass, or aluminum. The capacitance between the contact pads is very low, allowing for faster, reliable switching. The SPST means that the switch has two poles, and the 6.00mm x 3.50mm 5.00mm denotes the width, length, and height, respectively. Additionally, the 50mA@12VDC is the maximum current rating and voltage. Finally, the RoHS certification ensures that the switch is made in accordance with the European Union’s Restriction of Hazardous Substances, blocking the introduction of hazardous materials into the environment.