EV Contactor Manufacturer

Designed for optimal performance and dependability, the EV Contactor stands as the top-tier solution for your electric vehicle, seamlessly integrating into applications such as EV charging stations, ensuring reliable power flow and enhanced safety for your electric mobility experience.

Explore Our EV Contactors

HIITIO, a specialized manufacturer and equipment supplier of EV Contactors, is headquartered in Hangzhou City, Zhejiang Province. Ensuring the safety and reliability of your electric vehicle’s operation system is paramount, especially in High Voltage applications. Trust in Hiitio’s EV Contactors as your ultimate guarantee.

Our EV Contactors boast a current capacity of up to 1000A and voltage handling capabilities of up to 1500V, optionally equipped with auxiliary contacts. You can be confident that HIITIO’s EV Contactors offer optimal solutions for a range of HVDC applications, including EV Charging, Energy Storage Systems (ESS), Solar Energy, and more.

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SEMKO logo
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Features of HIITIO EV Contactors

Fast Switching

Ensure vehicle safety and performance by quickly establishing or interrupting circuits when needed.

High Reliability and Durability

Accommodates frequent operation under a wide range of conditions, including battery charging and discharging, vehicle operation, and parking.

Temperature Control

The ability to operate in a wide range of temperatures ensures reliable operation in both high and low temperature environments.

Electrical Isolation

To ensure the safety of the vehicle and maintenance personnel, EV contactors are able to provide effective electrical isolation to cut off power when required.


Competitive Price

  • Optimized supply chain, establishing close ties with reliable suppliers
  • Plan procurement, managing inventory
  • Optimized supplier delivery structures

Production capacity

  • 4 semi-automatic production lines and 1 fully automated production line to further enhance productivity and quality control

Quality Control

Comprehensive Certifications

  • UL, cUL, CSA, CE, CB, TUV, SEMKO, CCC, VDE, and more.
  • Actively researching customer needs and industry trends, seeking additional certifications.

R&D Capability

  • Independent laboratory for electrical life testing, breaking capacity testing, high and low temperature testing, etc. 
  • 30+ people R&D team with 10+ years developing experience


  • Pre-sales Services: product consultation, technical support, customized solutions, sample service, and fast delivery.
  • After-sales Services: Respond to your questions and complaints in a timely manner and provide the best solution.

What is EV Contactor?

The Electric Vehicle Contactor is an electrical control device integrated into automated control circuits. Functioning as an “intelligent control switch,” it employs a small current to govern the operation of a larger current. As a result, the EV Contactor serves the critical functions of automatic regulation, safety protection, and circuit conversion within the electric vehicle’s electrical system.

High Voltage DC Relays Contactors 16 9

Common Structure of A EV Contactor (Ceramic)

High Voltage DC Contactor structure

The Core Manufacturing Processes of EV Contactor (Ceramic)

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.

The Working principle of EV Contactor (Ceramic)

Control Signal:

The EV contactor operates in response to a control signal, typically an electrical input (such as voltage or current), received from a control system or circuit specific to electric vehicle applications.

Electromagnetic or Electronic Operation:

Upon activation by the control signal, the internal mechanism of the EV contactor, whether electromagnetic or electronic, initiates the switching action required for the opening or closing of the circuit.

Contact Engagement:

The internal contacts or switching mechanism of the EV contactor respond to the control signal, facilitating the establishment or interruption of the connection. This allows for the controlled flow or cessation of high-voltage power within the electric vehicle system..

Insulation and Durability:

EV contactors are designed with robust insulation and high voltage endurance to mitigate the risk of arcing or breakdown. This design ensures the reliable and safe control of the high-voltage direct current circuit in electric vehicle applications.

How to Select Your EV Contactor?

Applications of High Voltage Contactors

Electric Vehicle Charging Stations

EV Contactors are integral components in electric vehicle charging stations. They help manage the flow of high-voltage power from the charging infrastructure to the vehicle's battery system, ensuring safe and efficient charging.

Electric Vehicles (EVs) and Hybrid Electric Vehicles (HEVs)

EV Contactors are used in electric and hybrid vehicles to control the connection and disconnection of the high-voltage battery pack from the vehicle's electric drivetrain. They enhance safety during maintenance, repairs, or emergency situations.

Energy Storage Systems (ESS)

In applications like grid-connected energy storage systems, EV Contactors are employed to connect or disconnect the energy storage unit from the electrical grid. This helps manage the storage and release of electrical energy efficiently.

Solar Inverters

EV Contactors find application in solar energy systems, specifically in solar inverters. They facilitate the connection and disconnection of the inverter to the solar panels and the electrical grid.

Renewable Energy Systems

EV Contactors are utilized in various renewable energy applications, such as wind power systems and microgrid installations. They assist in managing the flow of electrical energy in these systems.

FAQ about EV Contactors

HIITIO’s EV Contactors are all UL certified and have TUV, CCC&CE certificate. And we have also obtained the IATF 16949:2016 certification.

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

You should inquire about the contactor’s rated voltage, current, and power specifications to ensure they meet your system requirements. Hiitio’s EV 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.

Yes, OEM and ODM are available.

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