Product Description

Packaging & Shipping

Qty/carton: 1000 pieces

MEAS: 30*30*45cm

G.W.: 15kg

N.W.: 14kg

Deliver time: 7-30 days

Warranty & Support

Free samples with freight cost collected

1 year warranty

7X24h technque support

Company Information & Certification

Zhejiang Zhongqi Electronics Technology Co., Ltd. is specialized in automotive relays, car horns and relevant connecters. Build in 2007, now have 300 experienced workers and 20 skilled engineers.

The company has established the ISO9001 International quality management system, and passed the ISO/TS16949 certification. Possessing an abundance of technical power and perfect management system make us to be the cooperator of many automobile manufacturers.

In the tenet of “To Forge China Quality Auto Parts”, we consistently introducing the world advanced technology and adopting international IEC technological quality standard, built and perfected quality management system and advanced computer integrated parameter automatic test system.

Relying on first-class quality and perfect after-sales service, our brand “RGL” has earned a wide reputation from customers in Asia, Europe and America. Warmly welcome friends from all walks of life, the exchange of information, to discuss cooperation, and create brilliant!

AUTO RELAY OVERVIEW

Relays are widely used in electrical applications when a large current/voltage needs to be switched on and

off by a low power control circuit. An example of this is in motor vehicle headlight circuits. If the headlight switch

on the dash controlled current to the headlights directly, a switch capable of carrying sufficient power to operate the lights would have to be used in the dash. It would also be necessary to connect the switch with wire of a sufficient gauge to transfer the power from the electrical system to the lights. A relay is a safer and less expensive way to operate a circuit that carries power, allowing control of up to 30 or 40 amps with a 15 amp control circuit. At 12 volts, 40 amps of current translates to 480 watts of power.

A relay consists of a set of switch contacts and a switching mechanism. This mechanism is simply an electromagnet. A metal core is wrapped with a coil of fine copper wire; the core becomes magnetized when voltage is applied to the coil. One end of the core is held within close proximity to one side of the metal switch contacts. When energized, the magnetized core attracts the metal contact and pulls it into contact. In doing so, the switch contacts close or "toggle". When the coil is de-energized, the magnetism in the core dissipates and releases the metal contact. The switch contacts then spring back to their original position.

The diagrams below are a schematic representation of a standard automotive relay. Pins 85 and 86 are the connections

for the electromagnet's coil. One will be grounded and the other connected to 12 volts. Either pin can be wired through a mechanical switch (as in the headlights application), or possibly by an electronic circuit containing ICs and/or transistors to switch the voltage on and off. In this application, a diode is often wired in parallel across 85 and 86 to help protect the IC or transistor from current transients created by the coil.

Pins 87, 87a, and 30 are the connections for the switch contacts, and are generally rated for at least 30 amps. This switch is a single pole, double throw type, or SPDT. Pin 30 is the "pole", which can "throw" to either of the other two contacts. In its normal state, the pole is connected to pin 87a. When energized, the relay toggles so that the connection is broken between the pole

and 87a and completed to pin 87. So depending upon how the switch is wired, it can open an electrical circuit as easily as close the circuit!

The terminals of a relay are defined as follows:

30 is the pole or common.87a is the normally closed connection.87 is the normally open connection.85 is connected to 12 volts or ground and may be switched.86 is connected to 12 volts or ground and may be switched.