Automotive General Purpose Relay 4121 SONG CHUAN Relay SPDT 30A Small Size

Automotive relay 4121(SONG CHUAN 804) SPDT 30A, 27.7*23*39.3mm

Description:

Relay is an electromagnetic device which is used to isolate two circuits electrically and connect them magnetically. They are very useful devices and allow one circuit to switch another one while they are completely separate. They are often used to interface an electronic circuit (working at a low voltage) to an electrical circuit which works at very high voltage. For example, a relay can make a 5V DC battery circuit to switch a 230V AC mains circuit. Thus a small sensor circuit can drive, say, a fan or an electric bulb.

Single Pole Double Throw (SPDT):

Such relay 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.

Features:

• Low coil power consumption

• High sensitivity.
• Small size, light weight.
• PC board mounting.

Applications:

Suitable for automobile, machine, electronic equipment, air conditioner and household appliances applications. PC board mounting and direct insert mounting available.

General data:

Coil data (@20°C)

CAUTION:

1.The use of any coil voltage less than the rated coil voltage will compromise the operation of the relay.
2.Pickup and release voltage are for test purposes only and are not to be used as design criteria.
3.Unless otherwise stated, the rated coil voltage specified in coil parameter tableshall be used for all tests and its application to the relay

Outline dimension(mm):

PCB board layout and Wiring diagram:

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