JQC-3FC (T73) DC6V 5Pin Relay
A relay is an electrically activated switch. It consists of a coil internally which will create a magnetic field that attracts a movable lever and then changes switch contacts when a current is flowing through it. The typical usage of the relay is to allow a low DC voltage circuit (circuit #1) to switch on or off a high voltage (DC or AC) circuit (circuit #2) without direct electrical connection between them. This means circuit #1 and circuit #2 are magnetically and mechanically linked but not electrically connected.