Hongtong Magnet Wire: Driving Innovation and Quality in Enameled Wire Manufacturing

Hangzhou Hongtong Magnet Wires Co., Ltd. was founded in 2004, has established itself as a professional manufacturer specializing in the research, production, and sales of high-performance enameled copper wires. Located in the rapidly developing Cangqian district of Hangzhou—an emerging hub of innovation known as “China’s Silicon Valley”—Hongtong benefits from a vibrant industrial ecosystem and convenient transportation links.

With a land area of 26,000 m² and modern facilities covering 23,000 m², the company operates more than 200 advanced production lines and precision drawing machines. Annual production capacity exceeds 6,000 tons, covering wire diameters from 0.03 mm and above.

Hongtong’s key product portfolio includes UEW polyurethane wires, EIW polyester-imide wires, and EI/AIW composite wires, widely applied in automotive components, household appliances, electrical instruments, and high-end industrial equipment. All products comply with IEC and GB standards, and major models are certified under UL, RoHS, and ISO9001:2015.

At Hongtong, we uphold the principle of “Quality First, Customer Satisfaction”, focusing on customer needs and long-term value creation. Our enameled wire products are trusted across industries such as electrical instruments, valve manufacturing, and high-end transformers.

We are proud to work with leading enterprises including Hollysys, Hangzhou Yuzheng, Zhejiang Sanhua, Zhejiang DunAn, and Foshan Hualu, establishing strong and lasting partnerships built on quality and reliability.

To strengthen its competitiveness, Hongtong is building a state-of-the-art Smart Factory, integrating automated data collection with intelligent visualization systems. This transformation enhances operational efficiency, reduces the risk of human error, and ensures stable, repeatable product quality.

For precision control, the company has introduced one of the most advanced online monitoring systems in China’s enameled wire industry. A laser-based diameter measurement device continuously inspects up to 36 production stations on a single coating line.

The measurement data is automatically transmitted to the coating thickness control unit, enabling real-time adjustments and consistent wire dimensions throughout the entire process. This intelligent monitoring technology ensures uniform insulation layers and supports fully automated quality assurance.

With robust capacity, proven reliability, and continuous innovation, Hongtong Magnet Wire is committed to delivering superior products and customized solutions — empowering the future of electrification and industrial advancement.