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Features and aspects of push button switches

2023-10-18

A push button switch is a type of electrical switch that is activated by pressing a button or plunger. It is commonly used to control the flow of electric current in various electronic devices, appliances, and control panels. Push button switches come in different configurations and styles to suit different applications and user preferences.

Here are some key features and aspects of push button switches:

1. Construction: Push button switches consist of a housing or body that contains the switch mechanism and terminals. The housing is typically made of durable materials such as plastic, metal, or a combination of both. The switch mechanism inside the housing includes contacts, springs, and other components that enable the switch to open or close the circuit.

2. Operation: Push button switches are operated by manually pressing the button or plunger. When the button is pressed, it engages the internal mechanism, either completing or interrupting the electrical circuit. Releasing the button returns the switch to its original position, either open or closed, depending on the switch's design.

3. Types of Contacts: Push button switches can have different types of contacts, such as normally open (NO) or normally closed (NC). A normally open contact remains open until the button is pressed, closing the circuit. A normally closed contact, on the other hand, is closed until the button is pressed, opening the circuit.

4. Single Pole or Multiple Poles: Push button switches can be single pole (SP) or multiple pole (MP). Single pole switches have a single set of contacts, whereas multiple pole switches have multiple sets of contacts, allowing control of multiple circuits or functions simultaneously.

5. Momentary or Latching: Push button switches can be either momentary or latching. Momentary switches return to their original state when the button is released, making them suitable for applications requiring temporary or momentary activation. Latching switches maintain their state even after the button is released until it is pressed again to change the state.

6. Illumination: Some push button switches feature built-in illumination, typically using LEDs, to indicate the switch's status or provide visual feedback. This can be useful in low-light conditions or for applications where the switch's status needs to be clearly visible.

7. Mounting Options: Push button switches can be panel-mounted or PCB-mounted. Panel-mounted switches are designed to be installed on the surface of a control panel or enclosure, while PCB-mounted switches are soldered directly onto a printed circuit board.

Push button switches are widely used in various applications, including industrial equipment, consumer electronics, automotive controls, home appliances, and more. They provide a convenient and reliable means of controlling electrical circuits with a simple press of a button.

When selecting a push button switch, consider factors such as the required electrical rating, voltage, current capacity, and the specific requirements of your application. It's also important to ensure proper installation and appropriate electrical safety measures when working with electrical switches.

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