Single Pole Single Throw Switch Definition

It can serve as an on off switch depending on how the circuit is wired.

Single pole single throw switch definition.

Single throw switch definition is a switch as on an electrical switchboard that by one operation engages a set of fixed contacts. An example is a light switch. An example is a pushbutton switch. A single pole single throw switch serves in circuits as on off switches.

Sp and dp refer to single pole and double pole st and dt refer to single throw and double throw. The difference between a single and double pole switch is that the latter controls two circuits at the same time. A single throw switch is a simple on. 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.

Single pole single throw normally open a simple on off switch. Pole refers to the number of circuits controlled by the switch. The number of throws indicates how many different output connections each switch pole can connect its input to. Whereas a single pole switch has on and off markings a three way switch doesn t.

That s because the three way switch is used in conjunction with another three way switch to power a single light fixture and turning the light fixture on and off may require different lever positions. A double pole switch is what you need to control a 240 volt device because 240 volt circuits have two hot wires. Spst switches are thus very simple in nature. When the switch is open the circuit is off.

When the switch is closed the circuit is on. Two for incoming hots and two for outgoing hots. Sp switches control only one electrical circuit. Single pole single throw spst switch circuit.

It has four terminals. A double pole switch is like two separate single pole switches that are mechanically operated by the same lever knob or button. Below is an example of a circuit which utilizes a single pole single throw switch. The first device was a single pole single throw spst relay and the second a four pole single throw fpst relay.

This means it has one input terminal and two output terminals. Dp switches control two independent circuits and act like two identical switches that are mechanically linked. Life testing and reliability predictions for electromechanical relays. Single pole single throw normally closed a simple on off switch.

The two most common types are single throw and double throw.