83268028

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Snap action switches, also known as limit switches, are mechanical devices used to complete an electrical circuit in response to the displacement of the device, rather than current or voltage. The general principle of a snap action switch works by using the stored mechanical energy of the device itself, generally a spring, to produce a rapid and instant change in the contact state of the switch. This stored mechanical energy is released when the switch senses an action, such as a change in temperature, a pressure or a displacement, to cause the device to move into its activated contact position.

These snap action switches, or limit switches, are extremely versatile and offer a range of contact speeds, positions and forces. This makes them ideal for applications from high-accuracy sensing to instant relay action. Despite their relatively simple construction, snap action switches can be fitted with a variety of contacts to offer a wide range of features on a single device.

One of the most common examples of this is 83268028 which is an application for sensing temperature with incorporation of snap action features. This type of switch is ideal for applications where rapid response and accurate temperature sensing are key requirements. It features both N.O. (normally open) and N.C. (normally closed) contacts and can be used to directly monitor the temperature of liquid or gaseous media. This makes it ideal for applications such as process control, air conditioning, comfort control, small motor starting and signalling.

83268028 utilises multiple snap actions which are initiated by changes in temperature, caused by a bimetal element. As the bimetal element expands and contracts accordingly, it causes a metal link arm to pivot, thus actuating the contact, and thereby producing a rapid, reliable response. This type of switch offers a wide range of options such as an adjustable setpoint, manual reset or, in some cases, an automatic reset.

In order to differentiate the 83268028 from other types of snap action switches, it is important to recall that its contact positions and speed of operation are determined by the form of the mechanical link. When the switch is activated, the corresponding contact is switched to the opposite state at exactly the same speed, so that the opening and closing of the contact are instantaneous. So, no matter what the state of the switch before the activation, when it is triggered it moves directly to its new position.

Snap action switches are available in a variety of sizes and contact types, as well as being able to provide a wide range of actuations and forces, thus making them extremely suitable for many applications. 83268028 is one example of where a snap action switch offers a reliable and highly accurate temperature sensing device which is capable of delivering a rapid response and can be automated to provide either a normally open or normally closed contact position.

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