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A 12v relay is an electrically operated switch. Many 12v relays use an electromagnet to operate a switching mechanism mechanically, but other operating principles are also used. Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits, repeating the signal coming in from one circuit and re-transmitting it to another. Relays were used extensively in telephone exchanges and early computers to perform logical operations.
 
Today, automotive relays are part of everyday life. Ozautoelectrics.com supplies a lasrge range of 12v relays and 24v relays. Different relays such as:
Normal Open Relays
Micro Relays
Mini Relays
Heavy Duty Relays
Fused Relays

4 & 5 Pin Relays
30, 40, 50 & 70Amp Relays
 
To purchase a Relay simply click on any of the images and you will be redirected to our online shop.