Before electric vehicles and renewable energy systems, high-voltage connectors were widely used in industrial applications, including power plants, heavy machinery, and medical, broadcasting, telecom, military, aerospace and scientific research equipment. They were also found inside CRT TVs, which required very high voltages to fire the electron gun and make it hit the screen to create an image.
While HV connectors are still used in these fields, it is vehicle electrification and renewable energy sources that have been accelerating their development toward designs with greater safety and durability.
In the automotive industry, specifically in electric and hybrid vehicles, the use of high-voltage interlock loop (HVIL) technology became a mandatory safety feature in components, including connectors, via the ISO 6469-3:2001 standard. Since then, there have been four generations of HV connectors for EVs.
Across applications, future innovations will yield higher voltage as well as cooling and sensing capabilities, with miniaturization and modularity also on the agenda.
China catching up
The manufacture of HV connectors is dominated by American and European industry giants, including TE, Amphenol, Molex and Aptiv. To narrow the gap to them, with a target of 50 percent localization within 2026, Chinese manufacturers are investing in R&D and production expansion.
Shanghai Weyer, for instance, is developing connectors that can safely handle up to 2,000V. It has already realized 1,500V units and snared 35 percent of the Chinese market in this range catering to EV applications. In its 800V connectors, the company has improved transmission efficiency by 15 percent and considers it a key differentiating factor compared to similar types available.
These efforts yielded a total revenue of $808 million in the first three quarters of 2025, placing Shanghai Weyer at the top of the category globally with a 12 percent share.
Kunshan Huguang, meanwhile, started full operation of its $69.55-million factory in mid-2025. Its annual capacity for HV connectors is 8 million sets.
China’s large EV market has attracted foreign investment as well. US company Aptiv, for instance, undertook a $270-million project in the Wuhan Economic Development Zone in 2023. In the first quarter of 2025, the facility began mass production of high-voltage sockets and connectors.
Automotive market
The market for automotive connectors in China remains on an upward trajectory, especially with the additional push from high-voltage types. It reached $7.93 billion in 2024 from $4.27 billion in 2017, according to Zhiyan Consulting.
During this period, the HV segment rose from $460 million, accounting for 10.79 percent of the total, to an astounding $4.15 billion for a lion’s share of 52.35 percent. In 2025, it represented $4.78 billion of the entire category’s $8.66 billion. This trend is expected to continue through 2027.
Fueling this rise is use in EV batteries, power distribution units, on-board chargers, DC-DC converters, inverters and high-voltage junction boxes as well as air-conditioning systems.
By rated voltage, these connectors are in the range of 60 to 380V and higher.
China-made HV connectors
High-voltage connectors in mainstream supply in China have a rated voltage of up to 1,000V, contact resistance of less than 0.5mohm, retention force of more than 50N, operating temperature of -40 to 125 C and life span of over 500 cycles. These are compliant with top-tier IP6K9K standards, ensuring high safety and reliability in EVs, as well as with UL, CE and RoHS requirements.
Zhengzhou Saichuan Electronic Technology Co. Ltd, one of the suppliers contacted for this article, has a series with double error-proofing for different key positions and 360-degree insertion at any angle for blind mating for secure and risk-free connections. These connectors have 1,500V rated voltage and 4,000V withstand voltage.
Typical of Chinese manufacturers, requests for customization of specifications, including sources of materials, are welcome.
For copper, nickel, gold, plastic, silicone and rubber, they usually turn to domestic providers. The cost of copper is expected to stabilize in the first half of 2026 and ensure no change in the prices of high-voltage connectors.
Production pool
Many suppliers of high-voltage connectors in China are found in the Yangtze River Delta and the Pearl River Delta regions. They are scattered in the cities of Suzhou, Changzhou, Ningbo, Hangzhou, Dongguan and Shenzhen in Zhejiang, Jiangsu and Guangdong. There are factories in Sichuan and Shaanxi as well.
A number of homegrown companies have gradually closed the technological gap with their overseas counterparts. They include Jonhon, Shanghai Weyer, Recodeal and Yonggui. The rest are small and midsize manufacturers.
Due to the Gulf Cooperation Council’s anti-dumping measures on China-made connectors below 1,000V and to higher US tariffs, suppliers have turned their attention to Europe, South America and other destinations. Some are building factories abroad.
The products in this gallery have been handpicked by our China-based market analyst for representing current trends in high-voltage connectors from Chinese suppliers.
Up to 1,500V connector
Company: Hubei Brave Electronic Technology Co. Ltd
Designed for use in electric vehicles, the Brave-0076-1634 connector is available in rated voltages of 600, 1,000 and 1,500V and rated current ratings of 50, 100 and 200A.
MOQ: 50 units
Lead time: 15 days
IP6K9K-rated high-voltage connector
Company: Shenzhen Renhotec Technology Electronics Co. Ltd
The 200A HVIL Connector from Shenzhen Renhotec has 800VAC/DC and 200A rated voltage and current. It withstands 3,500VAC surges. This IP67- and IP6K9K-rated unit meets CE and RoHS requirements.
MOQ: Negotiable
Lead time: 7 days
1,000VDC connector
Company: Shenzhen Smartcomtech Technology Co. Ltd
Rated at 1,000VDC, 16 to 350A, the HLDCONNECTOR003 from Shenzhen Smartcomtech operates in -40 to 140 C.
MOQ: 100 units
Lead time: 7 days
1,500V connector
Company: Zhengzhou Saichuan Electronic Technology Co. Ltd
This connector from Zhengzhou Saichuan, the SS1-12MM-400A, has 1,500V rated voltage, 250, 300, 350 or 400A rated current, 5,000Mohm insulation resistance after drying, 100-cycle mechanical life span and -40 to 125 C operating temperature. The withstand voltage is 4,000V. Option for an IP67 water resistance rating is available.
MOQ: 10 units
Lead time: 7 days
