The ceramic high-voltage DC contactor market is experiencing sustained growth, driven by the accelerating deployment of electric vehicles (EVs), battery energy storage systems (ESS), and utility-scale solar installations. According to industry research, the global market for ceramic high-voltage DC contactors is projected to expand from approximately USD 904 million in 2024 to nearly USD 1.96 billion by 2030, reflecting a compound annual growth rate of around 13.8%.
China sits at the center of this expansion. The country’s manufacturing ecosystem — spanning precision ceramics, hermetic sealing, and automated assembly — has enabled a cluster of specialized suppliers to serve both domestic and international demand. This article profiles ten of the most notable Chinese ceramic high-voltage DC contactor manufacturers, covering their backgrounds, product offerings, technical strengths, and contact information. The goal is to help procurement engineers, system integrators, and product designers navigate this landscape more efficiently.
1. HIITIO — Hangzhou, Zhejiang
- Founded: 2018
- Headquarters: Hangzhou, Zhejiang Province, China
- Core Products: Ceramic high-voltage DC contactors, HVDC fuses, semiconductor fuses, AC contactors, disconnect switch boxes
- Official Website: https://www.hiitio.com/
- Ceramic HVDC Contactor Category: https://www.hiitio.com/product-category/electric-vehicle/high-voltage-dc-relays-contactors/
HIITIO was established in 2018 as a focused spin-off utilizing the mature R&D capabilities inherited from Hecheng Electric. From the outset, the company has concentrated exclusively on high-voltage DC electrical components for new energy applications — specifically electric vehicles, photovoltaic systems, and energy storage. This specialized focus has allowed HIITIO to develop deep process expertise in ceramic vacuum brazing, tunnel furnace brazing, and laser penetration welding — all critical to producing hermetically sealed contactors with aviation-grade leak integrity.
HIITIO holds multiple certifications, including UL, CE, CB, SEMKO, and CCC, and maintains a dedicated team of over 200 staff. The company’s product range spans 20A to 1200A with switching voltages up to 1500VDC, serving customers across EV charging infrastructure, utility-scale energy storage, and commercial solar applications globally.
Key Product Highlights
HIITIO’s ceramic sealed contactor lineup — the HCF Series — covers a broad current range. All models use a ceramic brazing seal structure filled with a high-purity hydrogen/helium gas mixture, which minimizes contact oxidation and stabilizes contact resistance over the product’s service life. The non-polarity arc-extinguishing design supports bidirectional current flow, making these contactors suitable for a wide range of circuit configurations without orientation constraints.
Optional auxiliary contacts (NO type) are available across the lineup, and all products comply with RoHS requirements. The HCF800D and HCF1000A, in particular, are designed for heavy-duty ESS and fast-charging infrastructure where sustained high-current performance under elevated ambient temperatures is required.
2. Hongfa Technology — Xiamen, Fujian
- Founded: 1984
- Headquarters: Xiamen, Fujian Province, China
- Core Products: High-voltage DC relays, electromagnetic relays, contactors, circuit breakers, capacitors
- Official Website: https://www.hongfa.com/
Hongfa Technology was founded in 1984 and has grown into one of the largest relay manufacturers globally, with operations spanning more than 120 countries and a network of over 30 subsidiaries worldwide. In the Chinese relay industry, Hongfa consistently ranks first by overall economic efficiency and is widely recognized as a benchmark supplier for industrial, automotive, and energy applications.
The company’s engineering infrastructure includes multiple dedicated R&D centers and production facilities that produce tens of millions of relay and contactor units annually. Hongfa has built long-term supply relationships with major global OEMs and Tier 1 automotive suppliers, and in 2025 was recognized on the ‘Top 50 Supply Chain for New Energy and Intelligent Connected Vehicles’ list — reflecting its established position in the EV component ecosystem. Its product certifications include CE, CCC, UL, TUV, and others depending on product line.
3. HOTSON International — Guiyang / Suzhou
- Founded: Approximately 2008 (15+ years in HVDC contactor R&D)
- Headquarters: Guiyang, Guizhou Province, China (R&D center in Suzhou)
- Core Products: Ceramic sealed and epoxy-sealed high-voltage DC contactors and relays
- Official Website: https://www.hotsoninternational.com/
HOTSON is a subsidiary factory operating under the China Zhenhua Group, a state-backed electronics conglomerate with deep roots in military and aerospace electronics. This institutional background has shaped HOTSON’s engineering culture, which prioritizes hermetic sealing integrity, material quality, and long-term reliability over cost reduction. The company operates a 10,000-square-meter manufacturing facility and maintains a professional technical team of close to 30 engineers, supported by R&D collaborations with Nanjing Southeast University.
HOTSON has accumulated over 100 patents and holds certifications under ISO 9001, IATF 16949, CE, CCC, and UL. The company produces both epoxy-sealed and ceramic-sealed contactors, addressing a broad range of industrial and automotive applications, including EV battery systems, DC charging stations, solar photovoltaic equipment, wind power systems, UPS installations, and energy storage.
4. Kunshan GuoLi Electronic Technology (GLVAC) — Kunshan, Jiangsu
- Founded: 2000
- Headquarters: Kunshan, Jiangsu Province, China
- Core Products: Ceramic sealed high-voltage DC contactors, vacuum capacitors, vacuum interrupters, AC contactors, BDU/PDU power distribution systems
- Official Website: https://www.glvac.com/
Kunshan GuoLi Electronic Technology Co., Ltd. (GLVAC) was founded in October 2000 in Kunshan, Jiangsu Province, and has built its technical foundation on deep expertise in vacuum electronics — an engineering discipline closely aligned with the hermetic sealing and high-voltage switching requirements of DC contactor design.
The company operates across R&D, manufacturing, and sales of vacuum capacitors, vacuum interrupters, DC contactors, AC contactors, and allied products, serving markets spanning aerospace, military, medical, semiconductor fabrication, renewable energy, and new energy vehicles.
5. Zhejiang Zhongxin New Energy Technology — Haiyan, Zhejiang
- Founded: 2016 (restructured from Haiyan Zhongxin Electronics, est. earlier)
- Headquarters: Haiyan County, Zhejiang Province, China
- Core Products: Ceramic and epoxy high-voltage DC contactors, automotive relays, magnetic holding relays, electromagnetic relays
- Official Website: https://www.zhongxin-relay.com/
Zhejiang Zhongxin New Energy Technology Co., Ltd. was restructured in 2016 through a stock reform of its predecessor, Haiyan Zhongxin Electronics Co., Ltd. With a registered capital of 30 million yuan and a workforce of over 350 employees — including more than 50 technical R&D and management staff — Zhongxin is a high-tech enterprise focused on designing, producing, and servicing a comprehensive range of relay and contactor products for new energy applications.
The company’s production capacity exceeds 50 million units annually across more than 50 product types and 1,000 models, representing one of the more extensive catalogs among China’s contactor manufacturers. Its facility is strategically located in Haiyan County, positioned within a one-hour reach of Shanghai, Hangzhou, Ningbo, and Suzhou — providing convenient logistics access to major manufacturing and trade hubs. Products are used in electric vehicles, DC charging stations, photovoltaic systems, rail transit, energy measurement, and reactive power compensation.
6. Zhuhai Hanglian Technology — Zhuhai, Guangdong
- Founded: Not publicly disclosed
- Headquarters: Zhuhai, Guangdong Province, China
- Core Products: High-voltage DC contactors and relays (HLDC and HLVDC series)
- Official Website: https://www.hanglian.com/
Zhuhai Hanglian Technology specializes in the design and manufacture of high-voltage DC contactors and relays, primarily serving the electric vehicle, energy storage, and industrial DC application sectors. Based in Zhuhai — a city in Guangdong Province with a well-developed electronics manufacturing infrastructure — Hanglian has developed a product range that competes on insulation strength, contact resistance consistency, and mechanical longevity.
The company’s production and testing processes comply with UL, CE, and CCC certification requirements, which positions its products for export to international markets. While Hanglian is a smaller player relative to some of the larger enterprises on this list, it has built a reliable reputation in the domestic Chinese market and is increasingly active in overseas supply channels. The company’s HLDC and HLVDC contactor series are recognized for their performance consistency in EV and ESS applications.
7. Dongya Electric — Yueqing, Zhejiang
- Founded: 1984
- Headquarters: Yueqing, Zhejiang Province, China
- Core Products: DC contactors and relays (wide range including HVDC and low-voltage variants)
- Official Website: https://en.cndongya.com/
Dongya Electric was founded in 1984 in Yueqing — one of China’s most established electrical manufacturing hubs — giving the company nearly four decades of experience in the design and production of direct current switching components. Today, the company specializes in designing, manufacturing, and selling a broad portfolio of high and low-voltage DC contactors, offering dozens of product series and more than 300 individual models.
Dongya operates a 10,000-square-meter factory equipped with more than 10 production lines and modern manufacturing machinery. The company’s design engineering team brings over 30 years of cumulative industrial technology experience, and its products are deployed across communication power supplies, construction machinery, automotive applications, solar photovoltaic systems, aerospace, rail, and maritime equipment. UL, TUV, and CE certifications are held across relevant product lines.
8. LAZZEN (Shanghai Liangxin Electric) — Shanghai
- Founded: Not publicly disclosed
- Headquarters: Shanghai, China
- Core Products: HVDC contactors (NDZ3W, NDZ3T, NDZ3AT series), smart electrical solutions
- Official Website: https://www.lazzen.com/
LAZZEN, the international brand of Shanghai Liangxin Electric, is a provider of smart electrical solutions with a product focus that spans both conventional electrical control equipment and newer energy-sector components including high-voltage DC contactors. Operating out of Shanghai — China’s primary commercial and financial hub — the company benefits from proximity to a dense network of EV manufacturers, system integrators, and international trading partners.
The NDZ3 series of HVDC contactors represents Liangxin’s targeted offering for the EV charging station and energy storage markets. Products are designed with attention to both electrical performance and integration flexibility, supporting multiple mounting configurations and coil voltage options. The company’s smart electrical solutions positioning also suggests ongoing investment in digital integration and monitoring capabilities for evolving energy management applications.
9. Zhejiang Huanfang Automobile Electric Appliances — Wenling, Zhejiang
- Founded: 1990
- Headquarters: Wenling, Zhejiang Province, China
- Core Products: EV high-voltage contactors, solenoid switches, automotive relays
- Official Website: http://en.huanfang.com/
Zhejiang Huanfang Automobile Electric Appliance Co., Ltd. has been in operation since 1990, making it one of the older specialists in automotive switching components on this list. The company originally focused on solenoid switches and starter relays, and subsequently expanded into high-voltage DC contactors as the new energy vehicle market developed.
A notable aspect of Huanfang’s industry standing is its role as a drafting unit for national industry standards for solenoid switches in China — a designation that reflects the company’s technical credibility and regulatory engagement within the domestic industry. Huanfang’s manufacturing experience in automotive-grade components, combined with its standards participation, gives it a differentiated position when qualifying products for OEM vehicle platforms where national standards compliance is a requirement.
10. Aokai Electric — Wenzhou, Zhejiang
- Founded: 2008
- Headquarters: Wenzhou, Zhejiang Province, China
- Core Products: DC contactors, motor contactors, high-voltage DC relays
- Official Website: https://www.ak-contactor.com/
Aokai Electric was established in 2008 and has built its reputation as a CE-certified DC contactor supplier with a broad product catalog addressing both industrial and automotive market segments. The company is based in Wenzhou, Zhejiang — a city historically associated with private manufacturing entrepreneurship — and markets itself as one of the larger DC contactor manufacturers and suppliers in China by production volume.
Aokai’s product development approach emphasizes accessibility: offering a wide variety of coil voltage options (12V, 24V, 36V, 48V, 60V, 72V, 84V, 120VDC) across its standard catalog to minimize custom engineering requirements for integrators. The company targets applications including electric forklifts, automated guided vehicles (AGVs), industrial vehicles, lifting platforms, and auxiliary switching in energy systems.
Find Your Ceramic HV DC Contactor Solution at HIITIO
If you are sourcing ceramic high-voltage DC contactors for EV, ESS, or solar applications and need a manufacturer that combines advanced ceramic sealing technology with flexible customization and competitive lead times, HIITIO is worth evaluating. Established in 2018 with backing from Hecheng Electric’s mature R&D infrastructure, HIITIO has rapidly built a comprehensive product lineup — covering 20A to 1200A at up to 1500VDC, with all units produced under IATF 16949-governed automated lines.
The company holds UL, CE, CB, SEMKO, and CCC certifications and maintains a dedicated technical support team. Whether you need standard catalog products or application-specific configurations, HIITIO is equipped to support your project from initial specification through delivery.
