Push Buttons

Push buttons are simple switch mechanisms that close or open one or more circuits to control an aspect of a machine or process. Button switches are typically used to start or stop a process, with the switch being in a normally-opened or a normally-closed position. When an indication light is included in the pushbutton users can easily see the state of the switch. The most common sizes are 22 mm and 30 mm, but many 16 mm buttons are also available.

Push-button switches can be purchased as solid units, assembled components, or individual modular components.  While most of the buttons on pushbutton units are round, the buttons can also be square, rectangular, or octagonal.  Different colored push-buttons can be used to color code different functions. Button switches are also available with various UL, NEMA and IP ratings,  and are made to be used in either DC or AC voltage systems.