What Is The Symbols For A Switch In Schematic Diagrams

By | March 1, 2023



We’ve all seen diagrams with mysterious symbols that correspond to the switches and components our electronics are made up of. But what do these symbols mean? What is the symbol for a switch in a schematic diagram and how does it look?

The most commonly used symbol to represent a switch in a schematic diagram is a rectangle with two terminals extending from one end. Depending on the type of switch, the terminals can be located on the same side or on opposite ends. Usually, the two terminals will be labeled with an “I” and “0” respectively, to indicate an open or closed circuit.

The shape of the switch symbol varies depending on the function of the switch. A single throw switch, which is used to turn an electrical device on and off, will have only two terminals, while double throw switch, which controls two separate circuits, will have three terminals.

In most cases, the two terminals will also be connected to either a solid or dashed line, depending on the type of switch. A solid line indicates a single pole switch, which is used to interrupt power to the load, whereas the dashed line indicates a double pole switch, which is used to control multiple loads in a circuit.

In addition to the symbol for a switch, schematic diagrams include other symbols for different types of components, such as resistors, capacitors, and transistors. Knowing what all these symbols mean is essential for understanding how the various parts of a circuit work together.

Schematic diagrams are an invaluable tool for anyone working on electronics projects. Being able to recognize the symbols correctly will help you get the most out of your project. And you’ll find them useful even if you're just looking to identify the switches in a circuit. So the next time you come across a mysterious symbol, remember: it just might be the symbol for a switch.


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