This 4 pin SPST Round Button Tactile Switch features Gull Wing Pins and a contact current rating of 50mA. The switch length is 12mm with a width of 12mm and a height of 5mm. The switch features a black actuator/cap color and a round button actuator style. The mounting style is brick nogging. A tactile switch allows electricity to flow in an electrical circuit by manually pressing the operating section. The switch is used to supply an input signal to actuate a device or equipment. These switches are commonly used in many consumer and industrial electronic devices.