Foot Switches Guide

What is a Foot Switch?

An electrical switch is simply a device that opens or closes an electrical circuit, and a foot switch, sometimes called a "stomp" switch, is operated by someone stepping on the actuator, which is typically a pushbutton or a pedal.

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The advantage of using a foot switch is simply that it frees up a person's hands for other work while still allowing a human operator full control over switching.

What are foot switches used for?

Hands-Free Switching: You may consider getting foot switches for any application where having "hands-free" switching would be helpful.

Examples of "hands-free" applications includ: guitar amplifiers, wireless page turner for sheet music (e.g. if you have your sheet music on a tablet or laptop), woodworking equipment such as saws, sanders, or routers, and dental chairs

Voltage and Current Ratings

As with any component of an electrical circuit, you need to make sure your switch contacts can handle the voltages and currents of the circuit being switched. Voltage and current ratings will also vary depending on whether you switch AC or DC power.

Maintained or Momentary Action

The contacts in a maintained action switch will remain open or closed until actuated. For example, a maintained action foot switch may be useful for some lighting applications. In contrast, the contacts in momentary action switches will return to a normal position once the actuating force is removed.

Enclosure Protection Rating (NEMA or IP)

Different environments require different enclosure protection ratings. For example, NEMA-classified hazardous locations require special enclosures designed to prevent the ignition of combustible materials and contain explosions.

Number of Poles and Throws

Poles

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How many movable contacts do you require? Answering this question will help you figure out how many poles you need.

See the diagrams under "Common Pole and Throw Counts" for diagrams that illustrate the function of poles and throws.

Throws

You will want to figure out the number of circuits, or fixed contacts, you need a given pole to switch between to determine the number of throws you need.

Number of N.O. and N.C. Contacts

Do you need momentary action switches where the contacts open or close a circuit and then automatically return, using some sort of spring mechanism, to a normal position? If so, how many normally-open or normally-closed contacts do you need?

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