The tactile switch is an on/off electronic switch that is only on when the button is pressed or if there is a definitive change in pressure. Tact switches react to user interaction with the button or switch when it makes contact with the control panel beneath. In most cases this is usually a printed circuit board (PCB).
SMD tact switches
Miniature tactile, ultra-miniature tactile and microminiature tactile switches for printed circuit board mounting.