2Pcs- 12V Relay 12V Relay Switch DC 12V Relay 5 Pin 10A DC Coil SPDT Auto Universal Relay 12V Relay Switches 220V 10A SRD-12VDC-SL-C PCB Mount Power Relay

SONGLE 12V Relay 12V Relay Switch DC 12V Relay 5 Pin 10A DC Coil SPDT Auto Universal Relay SRD-12VDC-SL-C PCB Mount Power Relay 12V Relay Switch 220V 10A

This relay can be used to switch High power (whether AC or DC) to a load by driving the relay coil with a far much lower voltage and current. When Current flows through the relay coil, It makes or breaks its contacts through electromagnetic induction. A relay contacts comprises of the Normally-Open (NO) and Normally Closed (NC) contacts. These refer to the state of the relay contacts when the relay coil is not energized. When driving a relay coil from a digital output or transistor, always connect a diode in reverse bias across the coil of the relay in other to avoid the resulting back-emf that appears across the coil of the relay when its turned off from damaging the digital device or transistor.