P&P Distributors carries a wide range of electrical relay switches including Tesch, Siemens, Eaton and much more. Relays are electric switches that use electromagnetism to convert small electrical stimuli into larger currents. The relays control one electrical circuit by opening and closing contacts in another circuit. These conversions occur when electrical inputs activate electromagnets to either form or break existing circuits. When a relay contact is normally open, there is an open contact when the relay is not energized. When a relay contact is normally closed, there is a closed contact when the relay is not energized. In either state, applying electrical current to the contacts will change their state. Keep control of the current in your project with electrical relays from P&P Distributors.