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Pushbutton switches are commonly used to control basic circuits. They are often used to control lighting, fans, motors, appliances, and other load devices. Pushbuttons are also used for other automated systems, such as security, HVAC, fire alarm, and elevator systems. Pushbutton switches come in two main styles, momentary and latching. Momentary pushbuttons are buttons that only stay in the activated position while being pressed. When the button is released, it returns to its default position, usually off. Latching pushbuttons remain in the activated position after being pressed once, and require a second press to return to the default position.

The most basic pushbutton switch is the single pole, single throw (SPST) switch. This type of switch is typically configured as a momentary switch and is used to power a circuit on and off with a single press. These switches are typically non-locking, meaning that they will return to their default position when the button is released.

The double pole, single throw (DPST) switch is two SPST switches connected together. When the button is pressed, both switches are activated simultaneously, powering two separate circuits at the same time. These switches are typically used in applications such as lighting control, where one switch can be used to control two separate lights. The DPST is also available as a latching switch, which stays in the activated position after the button is pressed and requires a second press to turn it off.

Double pole, double throw (DPDT) switches are two SPDT switches connected together. These types of switches consist of three connections - two single pole connections and a common connection. When the switch is in the "off" position, the power is not connected to any of the poles. However, when the switch is activated, the common connection is connected to one of the two single pole connections, powering the connected circuit.

Pushbutton switches are also available as pilot lights, alarm switches, and push-to-reset switches. Pilot lights are switches that contain a built-in indicator light that will turn on when the switch is activated. Alarm switches are used in security systems and can be triggered by motion, temperature, or an alarm signal. Push-to-reset switches are used to reset circuits after a fault or power loss.

Pushbutton switches can be used in a variety of applications where a switch is needed to control a circuit, such as lighting and motor control. The type of switch needed will depend on the circuit\'s requirements and the desired functionality. Pushbutton switches come in many different styles, so be sure to choose the right switch for the application.

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