Automotive Relay 12v 40a Wiring Diagram

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Automotive relay 12v 40a wiring diagram.
Suitable for control kinds of automobile circuits.
External dimension wiring diagram.
12v 40a relay 4 pins automotive car van truck boat relay normally open contact.

The relay features a plastic housing with mounting tab for easy installation.
12 vdc automotive 5 pin relay spdt 3040a bosch type this bosch type 12v 40a relay is widely used in car sound and automotive security installations.
How to add a relay to up the amperage for your car stereo accessorys duration.

85 and 86 are the coil pins while 30 87 and 87a are the contact pins.
12v 40a automotive relay.
Numbers of a relay.

12v 40a automotive relay standard iso terminal layout for control kinds of auto circuits automotive relay manufacturer.
If you need a relay diagram that is not included in the 76 relay wiring diagrams shown below please search our forums or post a request for a new relay diagram in our relay forum.
Looking at the diagram we see the pinout of a typical 12v relay.

Basic car 3040 amp relay.
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Note that each pin is numbered.
Excellent shake resistance performance.
1 x ols rtt7121a 12v dc 40a 4 pin relay.

4 wire interlocking sockets.
What is a relay.
If the coil is not activated 30 will always be connected to 87a.

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These are heavy duty 30a relays with brackets and wiring harness.
A relay is essentially a switch that is operated electrically rather than mechanically.

Dozens of the most popular 12v relay wiring diagrams created for our site and members all in one place.
87 and 87a are the two contacts to which 30 will connect.
The wiring diagram shows the architecture of the relay.

Although there are various relay designs the ones most commonly found in low voltage auto and marine applications are electro mechanical relays that work by activating an electromagnet to pull a set of contacts to make or break a circuit.