CMA3 OMRON G8L General Purpose Relay SPDT 40A 28*28*26mm Without Shoulder

Automotive relay CMA3 (OMRON G8L) SPDT 40A, 28*28*26mm without shoulder

Description:

A relay is an electromagnetic switch operated by a relatively small electric current that can turn on or off a much larger electric current. The heart of a relay is an electromagnet (a coil of wire that becomes a temporary magnet when electricity flows through it). You can think of a relay as a kind of electric lever: switch it on with a tiny current and it switches on ("leverages") another appliance using a much bigger current. Why is that useful? As the name suggests, many sensors are incredibly sensitive pieces of electronic equipment and produce only small electric currents. But often we need them to drive bigger pieces of apparatus that use bigger currents. Relays bridge the gap, making it possible for small currents to activate larger ones. That means relays can work either as switches (turning things on and off) or as amplifiers (converting small currents into larger ones).

Advantages:

you can control the switch automatically by sending a small signal to the electromagnet so this signal switches on the circuit of a big appliance like a water pump motor, washing machine, elevator motor….anything. Electronic controllers uses very low current and voltage, so in order (for example) to switch on your big desk lamp or room lamp or washing with your computer in a smart home system…you make a controller circuit to which takes the control signal.

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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