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Snap Action, Limit Switches

Snap action, limit switches are electric switches with a precision mechanical control of the contact\'s opening and closing action. These switches are employed in all types of automated and measurement systems, industrial control equipment and both safety and alarm systems. They handle large currents, high shut-off power, and a wide range of operating temperatures.

The working principle of a snap action switch relies on the force of a spring, plunger, or rocker, which causes the lever to snap from one position to the other. When the preset force is exceeded, this abrupt action causes a "click" as the contacts open or close. This “click” sound can be heard in a silent room and can be used to judge the operation status of the switch, without looking at the connecting device.

Additionally, precise force and travel settings ensure the snap motion of the switch and guarantee an accurate contact position every time. This makes them ideally suited for use in automated systems where precise and repetitive switching action is mandatory. Because they use mechanical movement, they operate without fail in all extreme environmental conditions.

Application Field

Snap action, limit switches are commonly used in industrial applications such as controlling machining tools, conveyors, packing machines, machine tools, material handling equipment, and production lines. They are also used in applications that involve the control and measurement of motors, pumps, and other electrical equipment. In addition, these switches are found in control panels, lights, and other human-machine interface applications.

In the medical field, snap action, limit switches are also employed. They are perfect for medical equipment such as surgical tools, hospital beds, and other medical instruments. These switches are designed to require only minimal force to operate. As a result, they make them highly suitable in the medical environment where user safety is of utmost importance.

In automotive engineering, these switches are also quite common. They are used on a variety of applications such as auto-parking systems, keyless entry systems, automatic door lock systems, and engine control systems, to name a few. These switches allow for precise and repetitive switching action, making them ideal for today\'s automobiles.

Working Principle

Snap action, limit switches consist of a lever arm and an electrical contact. The lever arm has a plastic or metal actuator at one end and an internal spring at the other end. When the actuator is pushed, the spring contracts and it moves the lever arm to create a contact between the switch terminal and the external circuit. This contact generates an electrical signal that can be used to turn a device on or off.

When the external force on the actuator is released, the spring snaps back, thus breaking the contact between the switch terminals and the external circuit. The precise force and travel settings applied to the spring ensure the snap and accurate contact position every time. This ensures precise and reliable switching action, making them ideal for use in automated systems.

Snap action, limit switches are available in many different styles and sizes, meaning they can be adapted to a variety of applications with different requirements. Additionally, these switches can be used in hazardous and corrosive environments without fail since there is no electrical arc used to open or close the switch. Moreover, they are extremely reliable as they can operate in all extreme environmental conditions.

Snap action, limit switches are a versatile and reliable solution for any automated system or industrial application. They offer precise and reliable switching action and can be used in a variety of applications ranging from automotive to medical, and from safety to alarm systems. With their versatility and reliability, snap action, limit switches are sure to be found in many different types of applications.

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