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Pushbutton switches are electrical switches that use a manual push button to control current flow in an electrical circuit. The primary purpose of a switch is to allow or prevent current flow in a circuit. The pushbutton switch is actuated by an electric signal, or manually by hand or foot. Pushbutton switches are widely used in various applications ranging from control systems to home and office applications.

A basic pushbutton switch consists of two contacts, usually made of copper, which are mounted in a housing or frame. The contacts are then connected to the electrical power source, usually with wires or terminals. When the contacts are closed, current flows from the power source, through the contacts and the switch, then to the circuit. When the contacts are opened, the switch acts as a barrier and no current flows.

The most common type of pushbutton switch is the single-pole (SPST) switch. This type of switch is used to control a single circuit. When the switch is pressed down, the circuit is closed and current flows. When the switch is released, the contacts open, and current stops flowing. SPST switches are commonly used in household appliances, automobiles, and a variety of other applications.

Another common type of pushbutton switch is the double-pole (DPST) switch. This type of switch is used to control two separate circuits. When the switch is pressed down, both circuits are closed and current flows through both circuits. When the switch is released, both circuits are opened and current stops flowing. DPST switches are commonly used in control systems for industrial machinery.

Other types of pushbutton switches include momentary contact (MOM) switches, self-latching (SELF) switches, rotary (ROT) switches, and multiple position (MPOS) switches. All of these switches utilize the same basic principles as the SPST and DPST switches but vary in the number and type of contacts used. MOM switches are momentary contact switches in which the contacts are opened or closed by momentarily pressing the switch. SELF switches are self-latching switches which are opened or closed by pressing the switch and remain in that position until the switch is pressed again. ROT switches are rotary switches which can rotate between multiple positions in order to control multiple circuits. MPOS switches are multiple position switches which allow for up to seven positions in order to control multiple circuits.

Pushbutton switches have many applications in the industrial, commercial, and residential sectors. They are used in electronic control devices, audio and video equipment, network devices, and a variety of other applications. They are also used as emergency stop buttons, which are used to quickly stop an operation in case of emergency. Pushbutton switches are reliable and easy to use, making them a popular choice for many applications.

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