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Snap action and limit switches are components found in a wide range of applications and are what determine when and where a process or system will begin or end. A snap action and limit switch possesses a unique combination of characteristics that provides a reliable means of quickly activating or deactivating a process, system, or piece of equipment. This article will discuss the application fields for snap action and limit switches as well as their general working principle.

Application Fields

Snap action and limit switches are commonly found in the automotive, industrial, commercial, and residential settings. In the automotive setting, they are commonly used to control the operation of airbags and anti-lock brakes. In the industrial setting, they are used in large motors and pumps to control the speed or torque of the application, providing a safe and reliable method of operation and allowing for improved efficiency.

In the commercial setting, snap action and limit switches provide the same speed and torque control, but are used in lower power applications such as vending machines and automatic door openers. On the residential side, they are often used in thermostats and home automation systems, controlling when and at what temperature the air conditioning and heating systems are activated.

Working Principle

The working principle of a snap action and limit switch is based on a cam, plunger, and contact system. When the cam is activated, the plunger is moved, which then moves the contacts. The contacts can either open or close an electric circuit, depending on the switch\'s design. When the contacts are open, the circuit is off, and when they are closed, the circuit is on. This is the basic principle behind the switch\'s functionality and reliability.

The cam is connected to a lever, which is then triggered when the desired action is to be taken. The lever can be activated either manually, such as with a push button, or mechanically, such as when a pressure is placed on the switch. The plunger is then slid along its track, which causes the contacts to open or close, thus activating or deactivating the circuit.

Snap action and limit switches are a simple and reliable way of controlling the activation and deactivation of any system, process, or piece of equipment. They are used in a wide variety of applications and are an invaluable tool for any industry that needs reliable and swift activation or deactivation of any process. With their wide range of uses and ease of use, snap action and limit switches are an indispensable part of any automation process.

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