22AC2

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Snap action and limit switches are two similar but distinct components used in electrical equipment. Both devices activate and deactivate certain functions, such as switches and relays, depending on the input. A snap action switch is characterized by a physical movement which causes the switch to snap from one position to another in a quick and decisive manner. A limit switch has a more gradual control, where the switch is actuated to one position or another depending on the movement of an external element, such as a lever.

22AC2 Application Field and Working Principle

Snap action and limit switches are widely used in many different industries, including aviation and marine, robotics, instrumentation, automotive, aerospace and medical. Depending on the application, the switches are used to regulate temperature, pressure, current, voltage, and other variables. Snap action switches tend to be used in harsher environments where there is a need to quickly and decisively activate or deactivate a system. Limit switches, on the other hand, are well-suited to more moderate conditions and are typically used to detect the presence of an external element to the system.

The operation of snap action switches is based on physical principles, where the switch is designed to degrade upon a certain amount of mechanical force being applied. This causes the switch to suddenly snap into either an open or closed position. Limit switches work in a similar manner but generally involve more gradual motion. The switch is actuated by an external element, such as a lever or plunger, which opens or closes the switch depending on the orientation of the element.

Snap action and limit switches offer a reliable and durable way to control the operation of a variety of electrical components and systems. They are used in a broad range of applications and are capable of withstanding harsh conditions and high levels of force. Both have unique operating characteristics and are easy to install and maintain. Snap action switches are ideal for applications that require quick and decisive responses, while limit switches are ideal for moderate environments and applications where an external element must be detected. Both are essential components of today’s electrical marketplace.

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