A double pole double throw toggle switch is a combination of two individual spdt single pole double throw switches connected in the single assembly.
Single pole single throw switch diagram.
The dpst switch often appears in circuit breakers where it is used for 240 volt circuits with each pole carrying 120 volts.
Single pole single throw spst switch circuit.
A single pole double throw spdt switch is a switch that only has a single input and can connect to and switch between 2 outputs.
Look at the figure 1 2 the centre dotted line indicates that the dpdt switch is actually two spdt switches in one package.
It can serve as an on off switch depending on how the circuit is wired.
Wire the new single pole switch.
Spst switches are thus very simple in nature.
A double throw switch can also have a center position such as on off on.
The center position is off.
A double pole single throw dpst switch controls the connections to two wires at once where each wire only has one possible connection.
In other words it s like two simple switches controlled by a single actuator.
Dpdt double pole double throw toggle.
When the switch is open the circuit is off.
If the wire end is in poor condition trim off the bare end then strip about 3 4 inch of insulation using wire strippers.
This means it has one input terminal and two output terminals.
Inspect the end of each wire.
A single pole double throw switch can serve a variety of functions in a circuit.
A single pole single throw switch serves in circuits as on off switches.
Double throw closes a circuit in the up or down position on on.
Below is an example of a circuit which utilizes a single pole single throw switch.
The dpst switch for example has four terminals however is a double pole dp and not a four pole 4p switch.
When the switch is closed the circuit is on.