The PR18-H4A-242A32AA with Switch: push-button manufactured by SCI is an electromechanical device that requires a small force to activate. It often consists of two metal or plastic parts joined together by a spring. When the button is pressed, it activates an electrical switch that completes a circuit, allowing electricity to pass through. It is mainly used to control the energy of a machine or as an emergency stop switch. They are commonly found in home appliances, medical devices, automotive, and electronic equipment. This particular model is rated for up to 16A and 250V AC, features a large actuator head, and is UL/CSA approved.