Double Pole Double Throw Relay Symbol

Dpdt double pole double throw toggle.

Double pole double throw relay symbol.

This is the diagram below to learn all the pin terminals of a double pole double throw dpdt relay. 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 double throw spdt relay contains two coil terminals and common terminal then two switching terminals n o normally open n c normally close if there is not enough dc supply in. Pole refers to the number of circuits controlled by the switch.

The polarity of the voltage does not matter. But most frequently used relays are spdt relay and dpdt relay both are acts as electromechanical switch. It has 2 terminals and 4 connectors and you can look at the dpdt relay as the equivalent of 2 single pole double throw spdt relays. An animation illustrating how an spdt relay works.

It has one common terminal and 2 contacts. Sp switches control only one electrical circuit. Look at the figure 1 2 the centre dotted line indicates that the dpdt switch is actually two spdt switches in one package. Clicking the arrow button to reveal an internal cross section of the relay as it opens and closes.

A positive and negative voltage can be placed on either end. What do spst spdt dpst and dpdt mean. Dpdt double pole double throw. The dpdt relay double pole double throw is quite interesting and can be used in various scenarious including for changing the direction of a motor as you can see in the picture below.

The 2 coil terminals is where the voltage is placed in order to energize the coil. The main parts are all labelled and the circuit symbol is also shown the single pole double throw spdt relay is quite useful in certain applications because of its internal configuration.