High Voltage DC Contactor Manufacturer

Built for high performance and reliability, it’s the ultimate choice for your Electric vehicle, EV charging, photovoltaic power generation, energy storage system and other HV DC systems.

High Voltage DC Contactors (Ceramic)

HIITIO is a specialized manufacturer and equipment supplier of HVDC contactors.
Ensuring the safety and reliability of the operation system is of utmost importance when it comes to high-voltage applications.  The current could be up to 1000A, and the voltage could be up to 1500V, with auxiliary contact (optional). 

Hermetically sealed

Ceramic seal, H2 gas-filled cavity: no arc leakage, low and stable resistance

Strong short-circuit resistance

Strong short-circuit resistance: reliable contacts


Non-polarity arc extinguishing: flexible installation, safe bidirectional circuit.

Auxiliary contact

Optional Normally Open/Close auxiliary contact.



Years of experience


Countries & Areas




㎡ Headquarters

Reliable Quality​

Unmatched reliability, adaptable performance, and peace of mind in safeguarding your electrical systems.


Low Minimum Order Quantity from 100 Pcs to make it easier for you to access our products.

Fast Delivery

Implement streamlined processes and logistics to ensure that your orders are delivered promptly.

Factory Capability

Dedicated team of 200+ staff with peak efficiency, seamless coordination, and unmatched quality control.

Perfect Service

We deliver a comprehensive service package, guaranteeing your satisfaction, safety, and ongoing support.

All you should know about high voltage DC contactors

What is A HVDC Contactor

High Voltage DC Contactor is an electrical control device used in an automated control circuit. It is actually an “intelligent control switch” that uses a small current to control the operation of a large current. Therefore, it plays the role of automatic regulation, safety protection and conversion circuit in the circuit.

History of HVDC contactor

HVDC contactors, which began with projects such as the American space station and the “Comanche” helicopter project (initiated in 1983), have, after many years of development, acquired the following characteristics:

  1. Miniaturization
  2. Strong electrical switching performance
  3. Standardization and automation
  4. Intelligent integration

The Structure of A HVDC Contactor

High Voltage DC Contactor structure

What are the Core Processes for Manufacturing High-voltage DC Contactors?

Ceramic component brazing process:

We have mature ceramic vacuum brazing and Tunnel furnace brazing process. The core process and production cycle could be controlled by ourselves.

Gas-filled sealing process:

Achieving aviation-grade high vacuum levels, our product minimizes residual gas, ensuring unparalleled stability in electrical performance and an extended product lifespan.
Our products benefit from a high-purity blend of hydrogen and helium gases, ensuring optimal performance while accurately detecting even the minutest product micro-leakages.

Laser welding process:

The laser welding process has widely adopted the mainstream laser penetration welding technology, which, after extensive practical validation, ensures a mature, stable, and reliable process, providing excellent sealing performance for the product.”

Iron Core Spot Welding Process:

Utilizing the argon arc welding technique to firmly weld the iron core with the push rod, our spot welding process ensures reliable and stable weld points. This method guarantees the mechanical longevity and performance of the product.

How to Select Your HVDC Contactor

Selecting an HVDC (High Voltage Direct Current) contactor involves considering several factors to ensure the correct device is chosen for a specific application. Here are key steps to consider when selecting an HVDC contactor:

1. Operating Voltage: 

Ensure that the rated operating voltage of the DC contactor meets the voltage requirements of the system.

2. Operating Current: 

Select a DC contactor with sufficient carrying capacity according to the current load demand of the system.

3. Short-circuit Current: 

Determine the expected short-circuit current of the system and select a DC contactor capable of withstanding this current.

4. Pre-charging Control: 

Considering the system’s pre-charging resistance, pre-charging time and pre-charging current, choose a suitable DC contactor to realize a stable pre-charging process.

5. Turn-on life:

Determine the required turn-on life based on the voltage difference and current during turn-on, and select a DC contactor with the appropriate life.

6. Cut-off life:

Considering the abnormal conditions of the system and the need for cut-off with load, select a DC contactor with suitable cut-off life.

7. Mechanical environment:

According to the installation location and application environment of the DC contactor, select a contactor that can adapt to mechanical vibration and shock.

8. Temperature environment:

Consider the temperature environment in which the DC contactor is located and select a contactor that can operate properly in that environment.

9. Coil Control:

Consider factors such as the rated voltage of the coil drive power supply, the stability of the power supply, and the power supplied to match the coil control requirements of the DC contactor.

Applications of HVDC Contactor

EV HEV solution 4 3

Electric Transportation

DC contactors are widely used in electric vehicles such as electric cars, electric bicycles and electric motorcycles. They are used to control the start-stop, speed regulation and reverse operation of electric motors to realize the power control of vehicles.

solar panel 2

Solar and wind energy systems

DC contactors play an important role in solar and wind energy systems. They are used to control and protect the circuits of solar panels and wind turbines for the collection, conversion and storage of electrical energy.

dc circuit protection

Industrial Automation

DC contactors are widely used in industrial automation. They are used to control, protect and isolate DC circuits for automated control of various equipment and machines, such as machining equipment, conveyor lines and automated production lines.

Charging Satation Manufacturing workshop 6

Power Systems

DC contactors are used in power systems to control and protect DC circuits. They play an important role in DC transmission systems, DC distribution systems and DC power equipment, such as circuit breakers for DC transmission lines and control equipment for DC substations.

close up of lectric car lithium battery pack e1701238408602

Battery Management System

DC contactors play a key role in the battery management system. They are used to control the connection and disconnection of the battery pack, to realize the charging and discharging management and protection of the battery, and to ensure the safe operation of the battery pack.


You need to ensure that the purchased contactor complies with relevant industry standards and regulations and possesses the necessary certifications. HIITIO HVDC Contactors are all UL certified and have TUV, CCC&CE certificates.

On-vehicle warranty 5 years, non-vehicle 2 to 3 years

Certainly. We can customize it for you based on the certain amount.

You should inquire about the contactor’s rated voltage, current, and power specifications to ensure they meet your system requirements. Hiitio HVDC Contactors have the rated current range from 20A to 1000A, while the maximum Voltage could be up to 1500VDC.

When there is inventory, the delivery time is about 3 days. If there is no inventory, the lead time is subject to quantity and will be as early as possible.

Collaborate with Us to Create a Distinct Impact in Your Market

Get A Free Quote

  • We will contact you within 24 hours
  • Don’t worry, we hate spam too!

Powered by HIITIO | Privacy PolicyCookie Policy

Scroll to Top


  • We will contact you within 12 hours
  • Don’t worry, we hate spam too!
  • 20

    Years of experience


    Countries & Areas

    500 +



    ㎡ Manufacturing Factory

    Get Our Lastest Product Catalogue


    Years of experience


    Countries & Areas

    500 +