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Pushbutton switches are electrical switches which are characterized by their ability to change the state of a circuit when actuated. They are mostly used in industrial and commercial applications, but can also be found to lesser extent in home applications. Pushbutton switches are divided into two categories, momentary and maintained contact, with each having its own series of variants.

Momentary pushbutton switches are single-pole, single throw (SPST) switches that are actuated when a button is pushed. They are often used to control functions such as ejecting a CD or stopping a motor, since they will deactivate when the button is released. Momentary pushbutton switches are typically further broken down into toggle switches and tactile switches. Toggle switches remain activated while the button is pressed and are best used in applications that require a sustained action. Tactile switches provide tactile and visual feedback when actuated but typically require a separate power source in order to activate.

Maintained contact switches are also SPST switches that are designed to remain in the ‘on’ position until the user manually triggers the switch to change state. These switches are ideal for applications that involve intermittent actions, such as turning on a machine or resetting a circuit. They are used in applications where a user needs to quickly change the switch’s state without having to pulsate a button or flip a switch. Maintained contact switches are further broken down into illuminated and non-illuminated switch variants.

Illuminated switches are those that are equipped with a light that indicates when the switch is activated. These lights can come in the form of an LED, incandescent, or other types of light sources. These switches are commonly used in industrial applications where a user needs to quickly identify whether or not a switch is in the ‘on’ or ‘off’ position. Non-illuminated switches, on the other hand, do not have any built-in indicator or light source and are ideal for applications that do not require illumination.

Pushbutton switches are used in a variety of industries including aerospace, defense, medical, transportation, and construction. These switches are designed to be highly reliable and offer a wide range of features depending on their application. Depending on the type of application, pushbutton switches can come in different shapes, sizes, and materials and may have additional features such as a built-in transformer or auxiliaries contacts. Pushbutton switches can also be programmable, allowing users to customize the switch’s state according to their needs.

When choosing a pushbutton switch for a particular application, it is important to consider the environment in which the switch will be used. Environmentally sealed switches are typically best suited for outdoor and harsh industrial applications, while less expensive variants can be used in indoor and non-harsh environments. Additionally, it is important to consider the load rating and the electrical ratings of the switch; the most reliable switches will have higher ratings and will be able to handle higher current and voltage loads.

Pushbutton switches are used in a wide range of industrial, commercial, and home applications. They come in two main varieties: momentary and maintained contact, with each offering unique features depending on the application they are used in. In order to determine the best switch for a particular application, one must consider the environment in which the switch will be used as well as the load rating and electrical ratings of the switch.

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