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Push button switches are a type of switch used in various electronics applications to control the flow of current. They are available in a variety of sizes, shapes and types, from simple single-pole single-throw (SPST) buttons to complex multi-pole multi-throw (MPTT) switches. Push button switches are widely used in the automotive, industrial, computer, communication and home appliance markets.

The working principle of a push button switch is relatively simple. When the switch is pressed, a metal plunger or switch arm acts against a spring, either pushing it open or down, depending on the type of button being used. This action closes or opens the circuit, allowing or preventing current flow as needed. Once the switch is released, the spring returns to its original position, re-opening or closing the circuit as appropriate.

The most common applications for push button switches are in automotive and home appliances. In automotive applications, the switch may be used to control the power windows, horn, headlights, and other features. In home appliances, the switch is often used to control the power supply and enable or disable certain features. In both cases, the switch allows direct control of the action without the need for a potentiometer. Push button switches are also popular in industrial and commercial applications for controlling production and other processes.

Push button switches are available in a range of sizes and styles, from miniature switches to large industrial buttons. Depending on the size and complexity of the switch, different technologies may be used to control the flow of current, from mechanical contacts to optical or capacitive technologies.

Push button switches are often used in combination with other technologies such as timers, relays, and circuit breakers to provide additional functionality. For example, a push button switch may be used to initiate a timer which, in turn, activates a relay to control the power to an appliance or process.

Push button switches are an integral part of many electronics designs, providing users with a convenient way to control the flow of current and enable or disable features. The wide variety of available types and styles provides designers with the flexibility to find the right switch for any application.