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Did you know you can control how much power flows through a switch? If you’re not familiar with double-pole, double-throw (DPDT) switches, you probably don’t know all the ways they can be helpful. These switches are dual-purpose, offering the user two different poles and two different throws in each of the poles.

They are used to either break or complete an electrical circuit by switching on or off two separate circuits within a single device. They are mainly used in heavy-duty applications like industrial machinery, home appliances (like a lamp), and robotics. Let’s take a look at everything you need to know about DPDT switches in this website.

A double-pole, double-throw (DP-D-T) switch is a common electrical switch that allows to control two separate circuits with one switch. From the name, it means that this switch has a two inputs and four outputs. A single input controls two outputs hence the name double throw.

This kind of connection means that the switch allows you to direct current to a particular circuit depending on its power mode. This is achieved by a sliding bar or lever that moves from one set of contacts to another, switching the power on or off. The common applications for DPDT switches include lighting, motor control, and power control.

The common double-pole switches are usually composed of two independent sets of contacts on two stacked plates with four terminals. Each set is connected to its own pole, hence the name double pole. Within each pole, there are two contacts that can be thrown independently to allow current flow in either direction.

The way it works is quite simple: the current enters through one of the poles and goes through the first set of contacts which then passes through the second set of contacts and then out into another pole.

For a device with only one input/output pair, you can use this switch to turn something on/off or reverse its polarity. If you have more than one pair though, you have more options.

You can connect multiple pairs together so they all share a single input but have their own outputs and therefore their own separate control mechanisms (like a light switch).