D4E-1H21N

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Snap action, limit switches refer to components that actuate based on physical phenomenon change, including contact switching, and electronic magnetic switching. The D4E-1H21N is one type of snap action, limit switch which is suitable for a wide range of application fields due to its compact size, simple design and excellent durability. Its applications may include the control of motors, lighting control, emergency stop systems, and the regulation of boom cranes.

The D4E-1H21N is a mechanical switch that is usually actuated with a plunger. It contains a set of contacts, which open and close by snapping against one another when a certain amount of force is applied. Depending on the type of switch, the force may come from a spring or some other form of pressure. For example, in a lever switch, the contacts are actuated by the lever when pressure is applied; in a rocker switch, the contacts are actuated by a rocker arm when pressure is applied.

The working principle of the D4E-1H21N is simple and operates with a mechanical snap-action mechanism. The snap-action of the D4E-1H21N is provided by a spring-loaded plunger and two sets of contacts. When the plunger is pushed down to make contact with the lower set of contacts the upper set will be pushed up and open. When the plunger is released, the spring-loaded pin will snap back up and push the upper set of contacts, making them close and complete the circuit. The speed of the switching operation is controlled by the stiffness of the springs that actuate the plunger.

In terms of design, the D4E-1H21N uses a symmetrical mounting construction, which is beneficial in preventing misalignment and improves the quality of the connection. The contact structure of the switch utilizes an internal circuit board and a spring-loaded plunger, which ensures low contact-resistance and a long contact-life. The contacts bear gold-plating, which improves the anti-oxidation capability and contributes to the stable connection. Furthermore, the IP67 protection rating of the switch makes it suitable for use in industrial applications in which dust and water spray are present.

The D4E-1H21N is a high-performance and reliable snap action, limit switch suitable for a variety of application fields. Its compact size and simple design make it highly versatile and easy to install, and its strong and durable construction makes it suitable for long-term and repeated uses. Furthermore, the switch can be easily adapted to a variety of applications with its modular and detachable parts. As a result, it is an ideal choice for applications requiring high reliability and accuracy.

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