Single Pole Single Throw Switch Symbol. An on off switch allows current to flow only when it is in the closed on position. It can serve as an on off switch depending on how the circuit is wired.
Switch with delayed opening. An spdt switch routes one input circuit to one of two output circuits. This type can be used to switch the power supply to a circuit.
Single pole single throw normally open a simple on off switch.
This type of switch is sometimes called an a b switch because it lets you choose between two circuits called a and b. In this a is common to input terminal which is connected in the source. A basic on off switch that turns a single circuit on or off. Single pole single throw normally open a simple on off switch.
