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Snap action switches, also known as snap-acting switches, tactile switches or snap switches, are mechanical switches which when activated, rapidly opens and closes the circuit. They are connected to the external circuit either directly or through a switch contact or two. The switch contact is usually made of metal and usuallyhas no mechanical contact. Unlikethe usual electromechanical switches which operate through a mechanical contacts toopen and close their circuit, the snapaction switch has a metal spring that is designed to rapidly push the contacts open and closed when it is activated. This spring tension is the source of the switch\'s power.

Snap action switches are commonly used in a variety of applications. In the industrial field, they are used to control pressure sensitive machines, detect faulty circuitry, and to actuate factory automation equipment. They are also used in a variety of commercial applications, such as vending machines, security systems, automotive applications, games and toys. In addition, snap action switches are used in medical and military applications to detect a variety of conditions, such as radiation intensity and the presence of a hazardous material.

In electrical systems, snap action switches are used to control a wide range of voltage and current levels. For example, in a circuit breaker, a snap action switch is used to detect when the current exceeds a specified level and then quickly switch off the power supply. In power supplies, snap action switches can be used to temporarily interrupt the current for fault protection or for test and reset cycles. Snap switches are also used to detect motion in motion detectors and other motion sensing and control devices.

A snap action switch usually has a single set of contacts, which can be opened and closed quickly by the action of an electrical pulse through the internal spring. These contacts can be either normally open or normally closed. If a normally open switch is used, the contacts will open upon the application of a voltage or current. If a normally closed switch is used, the contacts will close when the voltage or current is applied.

In limit switches, snap action is used to sense a specific action, when a predetermined limit has been reached. These switches use a set of normally open contacts and a separate set of normally closed contacts. As the limit is reached, the contacts open and close rapidly, providing a pulse back to a control circuit. Limit switches are used in many industrial and commercial applications, such as monitoring the speed and position of industrial machines, and for controlling the position of elevators, conveyor belts, and gates.

In summary, snap action switches offer a versatile and reliable method for providing a quick and efficient switch response. They are extremely reliable, flexible, and easy to install and maintain. Snap action switches are used in a variety of industrial and commercial applications, including circuit protection, pressure sensing, motion sensing, and latching. Limit switches are used in industrial and commercial applications where a predetermined limit must be reached before an action is initiated. They provide a fast reliable way to monitor position, speed, and other conditions in a variety of applications.

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