Infotain India

                                              JQC-3FC(T73) DC12V PIN DESCRIPTION


 A relay is an electrically activated switch. It
consists of a coil internally which will creates
a magnetic field that attracts a movable lever
and then changes switch contacts when a
current is flowing through it. The typical
usage of 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.

 Connection diagram: the pictures in circuit diagram shows the bottom view of relay.


Single Pole Double Throw (SPDT) – Such
relay has 5 terminal pins which consists of a
pair of coil pins, a common pin, a normally
open (NO) pin and a normally closed (NC)
pin. When the relay is not activated, the
common pin is in contact with the NC pin
and when it is activated, the common pin will
break away from contact with the NC pin and
subsequently makes contact with the NO pin.
Also, when the relay is deactivated (from
activated state), the common pin will
conversely break away from contact with the
NO pin and return back in contact with the
NC pin.