What type of switch is classified as single pole - double throw?

A switch classified as single pole - double throw is designed to connect a single input to one of two outputs. This type of switch allows the user to choose between two different circuits or connections.

In practical applications, this means that when the switch is toggled, it can switch the current flow from one output to another, effectively allowing control of two different paths or devices from a single source. This functionality is commonly used in various electrical applications where selecting between two operational states is necessary, such as in lighting circuits or in control systems for machinery.

The other alternatives do not align with the definition of a single pole - double throw switch. For example, a switch connecting to multiple circuits at once implies a different configuration, and a switch that operates sequentially through multiple positions suggests a multi-pole or complex mechanism, rather than simply diverting one input to two possible outputs. A permanently engaged switch does not offer the flexibility to toggle between connections, which is a fundamental characteristic of the single pole - double throw switch.