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Electronic manufacture ranking
Top 10 Automotive Relay Manufacturers in China

Different from traditional vehicles, new energy vehicles need to be equipped with high-voltage DC relays, which, as rigid components in new energy vehicles, play a vital role in protecting the safety of automotive circuits. In recent years, under the catalysis of the new energy vehicle market and the encouragement of relevant policies, high-voltage DC relay technology has developed rapidly and has achieved large-scale application in new energy vehicles.

In this article, we recommend the top 10 automotive relay manufacturers in China for you to select.

Table of Contents
How does EV relay work

TOP 10 automotive relay manufacturers in China

Xiamen Hongfa Electroacoustic


TÜV Rhein Issued Functional Safety Certification Certificate for Xiamen Hongfa Relay
TÜV Rhein Issued Functional Safety Certification Certificate for Xiamen Hongfa Relay

Headquarters: Xiamen, Fujian
Established time: 1984
Website: https://www.hongfa.com/en/

Company profile
Hongfa Co., Ltd. (stock code: SH600885) was established in 1984. For more than 30 years, it has established a complete relay industry system with complete categories and supporting facilities. At present, Hongfa has more than 40 subsidiaries, and established three R&D and production bases in Xiamen, Zhangzhou, East and West.

Main business and products
Hongfa has been deeply involved in the automotive relay industry for nearly 30 years and has maintained stable cooperative relations with world-renowned OEMs and Tier1 suppliers. The automotive relays, 48V relays, charging modules, BCMs, gateways, high-voltage DC relays, high-voltage boxes, oxygen sensors and relays for general modules are provided by Hongfa.

Sanyou Corporation

Sanyou Relay

Sanyou Relay located in Dongguan, Guangdong
Sanyou Relay located in Dongguan, Guangdong

Headquarters: Dongguan, Guangdong
Established time: 2008
Website: https://en.sanyourelay.com/pc/index

Company profile
Founded in 2008 and located in Dongguan, Guangdong, Sanyou Corporation Limited is a professional high-tech enterprise integrating R&D, manufacturing and sales of relay, and one of Top 100 Electronic Component Enterprises in China.

Main business and products
Sanyou products include more than 100 series and tens of thousands of product specifications, covering five categories of general power relays, magnetic latching relays, automotive relays, new energy relays, and transformers. Products are widely used in household appliances, smart meters, industrial control, smart home, automobile manufacture, new energy applications, electric power, electromechanical leakage protection, distribution transformer monitoring, and other fields.

Doublecircle Electronics Group

Doublecircle group

Doublecircle Electronics Group located in Bengbu, Anhui
Doublecircle Electronics Group located in Bengbu, Anhui

Headquarters: Bengbu, Anhui
Established time: 1990
Website: https://en.doublecircle.com/

Company profile
Bengbu Doublecircle Electronics Group Co., Ltd. was established in 1990 and reformed into a joint stock limited company in 2015. The main well-known customers of the company at home and abroad include CASIC, CASC, AVIC, CRRC , ZTE, Xiaomi, NVC lighting, ABB, Wells, Rockwell, GE, Siemens, etc. It is a national high-tech enterprise and an innovative enterprise in Anhui Province.

Main business and products
Doublecircle Electronics Group specializes in the R & D, production and sales of various electronic components such as resistors, inductors and high-voltage contactors. Its products are widely used in aviation, aerospace, shipping, communications, automatic control, instrumentation, rail transit, charging piles, new energy vehicles, LED lighting and other fields.

HKE made a wonderful appearance at Electronic Asia
HKE made a wonderful appearance at Electronic Asia

Headquarters: Ningbo, Zhejiang
Established time: 1976
Website: https://www.zhejianghke.com/

Company profile
HKE was founded in 1976, for about 40 years HKE has become the leading relay manufacturer in China, As one of the National High-Tech enterprises HKE has been counted among the “China Top 100 Electronic Component Enterprises” since 2004. HKE’s quality control system conforms to ISO9001 and ISO/TS16949 Environment system conforms to ISO14001, and also becomes SONY GREEN PARTNER. HKE products are UL, CSA, TUV, VDE and CQC approved. 

Main business and products
HKE mainly produces signal relays, power relays and automotive relays. They are widely used in air conditioners, refrigerators, microwave oven, OA equipment, car alarm, central locking system, power window, seat adjustment control, fan motor, etc.

Tianbo Electronics


TBO located in Ningbo, Zhejiang
TBO located in Ningbo, Zhejiang

Headquarters: Ningbo, Zhejiang
Established time: 1989
Website: https://www.tianbo-relay.com/en/index.php

Company profile
Founded in 1989, Tianbo Electronics is a high-tech enterprise specializing in the research, development, production and sales of relays. The company has established a provincial-level high-tech enterprise research and development center. Tianbo has repeatedly entered the ranks of “China’s Top 100 Electronic Components Enterprises” and is committed to product innovation, process innovation and management innovation.

Main business and products
Tianbo Electronics products cover the range of telecom relays, power relays, automotive relays and magnetic latching relays, and have passed domestic and international safety certifications,such as UL/CUL,VDE,TUV, CE, SEMKO and CQC.The company has passed ISO9001, IATF 16949, ISO14001 and intellectual property management systems, and has a complete quality assurance system.

  • Telecom Relay
  • Power Relay
  • Automotive Relay
  • Magnetic Latching Relay
Suji Electronic located in Suzhou, Jiangsu
Suji Electronic located in Suzhou, Jiangsu

Headquarters: Suzhou, Jiangsu
Established time: 2003
Website: http://www.szsjdq.com/

Company profile
Founded in 2003 and located in Suzhou, SUJIDIANQI has decades of rich experience in the field of power protection components and equipment manufacturing. The company has always been market-oriented, seized opportunities, and actively expanded products in the fields of photovoltaics, new energy and automobiles on the basis of the original main business.

Main business and products
SUJIDIANQI mainly produces and sells products including electric relays, high-voltage DC contactors, automotive eddy current retarder control systems and components, automotive engine intelligent cooling systems (SJATS) and control units, etc.

GuoLi Electronic Technology


GL is located in Kunshan, Jiangsu
GL is located in Kunshan, Jiangsu

Headquarters: Kunshan, Jiangsu
Established time: 2000
Website: https://www.glvac.com/

Company profile
Founded in 2000, Kunshan GuoLi Electronic Technology Co., Ltd.(GLVAC) is a high-tech stock-holding enterprise that specializes in developing and manufacturing electrical vacuum products. GLVAC has obtained the certification of quality management system TS16949 and ISO14001.

Main business and products
Kunshan GuoLi Electronic Technology Co., Ltd.(GLVAC) engages in R&D, manufacturing and selling High Voltage Relays, Vacuum Capacitors, Vacuum Interrupters, DC and AC Contactors, Circuit Breakers, Hydrogen Thyratrons, Magnetrons, Spark Gaps and other vacuum electrical apparatus.

These products are mainly used in mining, broadcast communication, new energy (including motor vehicles), metallurgy, power, medical, semiconductor, environmental protection, industry flaw detection, security inspection and other devices.

Also read: AC vs DC – A Complete Guide on What You Need to Know

Omron participated CMEF 2023
Omron participated CMEF 2023

Headquarters: Pudong, Shanghai
Established time: 1996
Website: https://www.fa.omron.com.cn/

Company profile
Omron Automation (China) Co., Ltd. is a multinational company leading industrial automation products and applying advanced technologies. As part of Omron’s global business, it has become a leader in the field of automation.

Main business and products
As a global leader in the field of automation, OMRON’s business fields cover a broad spectrum, ranging from industrial automation and electronic components to social systems including automated ticket gates and solar power conditioners, healthcare.

  • General relay
  • Safety Relays
  • Terminal relay
  • I/O relay terminals
  • Solid state relay
  • Power conditioner
  • PCB relays

Also read: Relay module – How does it work and how to use it with Arduino

Fujitsu china located in Beijing
Fujitsu china located in Beijing

Headquarters: Beijing, China
Established time: 1995
Website: https://www.fujitsu.com/cn/

Company profile
Fujitsu Component Limited manufactures and sells Switching Devices (relays) and Human Interface Devices (touch panels, thermal printers, keyboards, wireless modules, KVM switches). It supports customers with its sophisticated component solutions and products together with group companies around the world.

Main business and products
Fujitsu Component provides the wide range of PCB relays for signal, power, and automotive applications as one of the top relay manufacturers. It also provides eco-friendly products like cadmium-free power relays and relays for PV systems and High Voltage DC distribution systems that contribute the reduction of CO2 emission.

  • Signal Relays
  • Power Relays
  • Automotive Relays
  • Solid State Relays
Denso located in Aichi Prefecture, Japan
Denso located in Aichi Prefecture, Japan

Headquarters: Aichi Prefecture, Japan
Established time: 1950
Website: https://www.denso-electronics.com/en/index.php

Company profile
As the only electronic products company in the DENSO Group with an integrated manufacturing system covering every stage from design to development to production, Denso Electronics contributes to driving culture as a supplier of electrical and electronic automotive components.

Main business and products
Denso Electronics produces a diverse range of products including relays, buzzers, a variety of ECUs, sensors, and more.

  • Power Relay
  • Solid State Relay Module
  • High Voltage Relay
  • Acoustic Vehicle Alerting System (AVAS)

The automotive relay is an electrical control device, which is an electronic component that causes the controlled quantity to undergo a preset change in the electrical output circuit when the change of the input quantity reaches the specified limit.

Automotive relay plays the role of automatic adjustment, safety protection, and conversion circuits in automotive circuits.

1.Due to the influence of temperature and the heating of the relay itself, the coil resistance value of the relay will also change.
2. Pay attention to the insulation level of the relay before use.
3. It has better not to exceed the rated voltage of the relay, which will cause the insulation of the coil to drop, short circuit between turns, and burnout.

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Hi, I am Bella, a professional PCB and PCBA related field content creator. Since I graduated, I have dedicated myself to PCB and worked with PCB engineers to complete various PCB and PCBA design and manufacturing projects. Based on the electronic knowledge accumulated as a PCB engineer for more than 5 years, I am now mainly responsible for writing content about PCB and PCBA by sharing some skills and views. If you have any ideas and demands about electronics, especially about PCB, you can feel free to leave your messages on our comment section and I would like to share my views and suggestions with you.

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