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Snap action switches and limit switches are widely used for different applications, as they provide low cost, low current, and reliable operation in a number of environments. The most common application field for these two switches is the automotive industry, where they are used for controlling brakes, doors, windows, windscreen wipers, etc. Let\'s look at how these switches work and what kind of applications they are suited for.

Snap Action Switches

A snap action switch is a mechanical switch that works by snapping from one state to another when an external force is applied. It is characterized by a consistent actuation force that sets off the switch with a snap-like motion. A snap action switch is typically used in applications requiring a fast, precise, and repeatable performance with a precise location.

Snap action switches are widely used in the automotive industry, primarily for brakes, doors, windows, and windscreen wipers. They are also used in industrial applications such as controlling pressure, flow, and temperature, as well as in consumer electronics for controlling the flow of electricity.

The working principle of a snap action switch is that when an external force is applied, the switch snaps from one state to the other. This is achieved by a plunger, which is pushed against a lever or actuator. As the plunger is pushed, the lever is raised and the switch is activated. To deactivate the switch, the plunger is released, causing the lever to return to its original position, thus turning off the switch.

Limit Switches

A limit switch is a device used to control the movement of a machine or apparatus. It is used to turn on and off electrical circuits, limit the movement of an object, or to detect an object\'s presence in a particular position. Limit switches are commonly used in applications such as door openers, window openers, car brakes, and other motor control applications.

The working principle of a limit switch is that it responds to a change in a physical parameter such as a temperature, pressure, or physical position. When the parameter reaches a predetermined value, the switch is triggered and turns on or off the electrical circuit. The most common type of limit switch is a foot-operated switch, which is used to control the speed of a motor or the position of a valve.

Limit switches are also used in applications such as conveyor systems. A limit switch is attached to an arm or a bumper which, when triggered, will stop the conveyor belt from moving. This is used in safety applications to protect workers from being injured or the machinery from being damaged. Another common use of limit switches is in industrial equipment, where they are used to detect the presence of objects in a certain position and to trigger an action.

In summary, snap action switches and limit switches are essential components in many applications. They are widely used in the automotive industry, as well as in other industrial and consumer electronic applications. Snap action switches work by a plunger which is pushed against a lever or actuator, and limit switches are triggered when a physical parameter reaches a predetermined value. Both are used for controlling the speed of motors, the position of valves, and for safety applications.

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