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The Different Types Of Contactors And How They Work?

Different Types Of Contactors And Their Working?

A contactor is an electrical device that you can use to switch an electrical circuit. It can relay a signal that it receives and sends it back, making it a particular type of relay. Typically, you can use the relay in applications that require a low amount of current. You can also use the contactor for more current applications. These contactors function ideally and have unique features that make them easier to mount in the field. They are also compact and can serve various purposes. This article will provide you with a detailed overview of the different contactors and their work.

How Do Contactors Work?

Current goes from the external control circuit through the contactor, an electromagnetic core. The coils provide a magnetic field that connects the moving contactor to the floating contact. The current then passes through the connections which link to the main load. It de-energizes the coil when it removes the electric flow, and the magnetic force falls to zero. The Spring force has to overcome the back force of the electric contactor to produce a desired amount of energy.

What are the Major Parts of Contactors?

To learn what a contactor is, you should know the various parts. It has three essential components according to the contactor wiring diagram:

* The Coil/Electromagnet 

The coil provides the driving force that closes the contact. You can use many types of materials to make an electromagnet. Materials like copper wire, steel wire, and iron filings are all possible composites that you can wrap around a magnetic core. The coil has a fixed one and a movable part with a spring connecting both parts. This structure creates a spring-based mechanism that works as an elastic band.

* Contacts 

Contacts are beneficial for managing the current contactors. There are many different contactors: auxiliary contactors, power contactors, and spring-loaded contactors; two are continuous power contactors: stationary and movable contactors. For making contacts, the material should meet high property requirements. It should withstand erosion and mechanical stress, something the solder paste usually cannot survive.

* The Frame or Enclosure 

You can use the enclosures inside switched contactors to prevent the internal parts from contacting the outside environment. The contactors shield the contacts from dust, bad weather, explosion hazards, and oil and are also safer and more convenient because of a proximity switch.

GYHC 40 2P 2NC 2 ac contactor

Significant Difference Between AC Contactors and DC Contactors?

If you are frequently around electronics, there’s a good chance that you already know what power contactors do. They are electrical devices that switch circuits on and off through special relays. Power contactors are more common than it may seem, and people use them in applications like electric motors that have multiple contacts, often referred to as contacts. Manufacturers typically make power contactors depending on the application, features, and capabilities they provide. We can classify them into AC contactors or DC Contactor. The difference between them lies in the providers and end-users.

The Major Differences Between AC Contactors and DC Contactors are as Mentioned Below:

  • Contactors are devices that you can use to conduct electricity through a wire, with one type of contactor being AC and the other DC. The main difference comes in how manufacturers construct them. AC contactors have a grid arc extinguishing device, while DC has a magnetic arc extinguishing device.
  • The alternating current contactor uses the principles of alternating current. It has an iron core and outer layer made from silicon steel, preventing eddy current and hysteresis loss. DC contactors do not require lamination because manufacturers make them durable, long-lasting materials. That means you can build them using cast iron or a type of steel that lasts for a long time.
  • Silicon steel plating on contactors is essential to prevent overheating. There is no heat from the DC, unlike AC, so iron rods need no plating protection in a DC contactor.
  • The DC contactor has a U shape, while the AC unit contactor has an E shape.
  • One of the most important metrics you must consider is the maximum operating frequency. The DC contactor has a max operational frequency of 1200 times per hour, while AC contactors have 600 times per hour.
  • The design of the AC contactor allows functioning at lower resistances. Many of the coils that people use in these products are thicker and smaller, ensuring you get adequate space between each loop not to overheat. They can overcome heavy resistance and provide more turns without overheating. You can spiral the coil quickly into a thinner cylindrical shape because there’s no heat generation in DC contactors.

Available Products

GLC1 Industrial AC Contactor


With new technology and automated production, automatic testing, and QA equipment, the GLC1 AC contactor can meet your needs. That makes it a high-quality product. GLC1 AC contactor is a reliable product and has a patented design that allows the user to maintain the quality of their power supplies. GLC1 AC contactor is also very affordable, making it an ideal choice for any business.

GEYA GLC1 AC Contactor technical parameter:

Contactor ModelGLCl-09
Main circuit characteristics
Rated insulation voltage (Ui)690
Conventional thermal current(lth)2020324050608080100100
Rated operating current(le)  A380V,AC-39121825324050658095
Rated operating power(Pe) kW  380V,AC-345.57.5111518.522303745

GYHC Household Modular DC Contactor

GYHC Household Modular DC Contactor

The GYHC series modular contactor employs a new technological platform and automated production and testing equipment to manufacture innovative ultra-quiet and long-life contactors.

GEYA GYHC AC Contactor technical parameter:

GYHC Contact-50/60Hz 
TypeRated current(In)Control voltage (V AV)(50/60Hz0)ContactMultiple Of The Width Of The Module 












TypeRated current(In) Wire stripping LengthCircuitTorqueCopper wire 
Hard wireSoft wire or hoop wire terminal
KCH8PZ1:4mm16-63A9mmControl circuit1.2N·m1.5~2.5mm:2×1.5mm²1.5~2.5mm:2×1.5mm²
 16-25APower circuit1.5~6mm1.5~4mm2
P72:6mm40-63A14mm 35N·m6~25mm²6~16mm²
ASPZ1:4mm  9mm——1.2N·m1.5~2.5mm:2×1.5mm²1.5~2.5mm:2×1.5mm²


An electrical contractor is a device that provides an electrical connection between two conductive surfaces. It uses a rotating armature with multiple circular contacts to make and break the link. You can use electrical contractors for many purposes, such as switching on the power, controlling industrial processes, or turning on lights in commercial buildings. Now that you know of GEYA, it’s your turn to get a fully fitted electrical contractor. With the company’s help, you can get good quality and affordable products at a price you can afford. It will ensure that every moment gets fully electrified and never face any power outage again!

Picture of William

I am William, Electrical Engineering Author. Dedicated to writing technical articles on Timer Relay, Monitoring Relay, Surge Protection Device and other electrical devices. With 7 years of writing experience, I am committed to providing accurate and in-depth expertise to my readers.

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