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A DPDT switch or Double Pole Double Throw switch is an electromechanical switch with two inputs and four outputs, with each input having two corresponding outputs. A simple way to think of this switch is to imagine 2 SPDT switches side by side with the 'handles' attached to each other. Perhaps the most popular use for this switch is 'phase or polarity reversal'. So, how does the DPDT switch accomplish this? First, you have to wire the 2 'top' and 2 'bottom' terminals in a 'criss-cross' fashion. The top 2 terminals become the input and the middle two terminals become the output. Let pin1 is X,pin2 is Z,pin5 is Y and pin6 is W now, W & Y are connected, as are X & Z. The polarity is maintained because the input and output are directly connected When the switch is in the 'down' position. The + input goes from the 'W' terminal, down to the lower right, and then up to the 'Z' terminal. The negative input goes from the 'X' terminal and out through the 'Y' terminal. See what has happened? With one flip of a switch, polarity has been reversed.

This switch is very simple to install electronic components because it includes a locking system that allows you to directly lock and unlock the switch in your remote cabinet without the use of any screws or Nut-Bolts.