Featured High-Frequency Litz Wires
Engineered for low skin effect loss, high mechanical flexibility, and superior dielectric insulation in demanding high-frequency applications.
South Korea's High-Tech Industrial Landscape & Electromagnetic Demands
South Korea stands at the global forefront of advanced electronics manufacturing, automotive innovation, and green energy technology. With industrial hubs extending across Seoul, Suwon, Incheon, Ulsan, and Gumi, South Korean manufacturers lead the development of next-generation Electric Vehicles (EVs), 5G telecommunication infrastructure, semiconductor equipment, and high-density power supply units. Operating in high-frequency AC environments, these cutting-edge technological applications require specialized magnet wire solutions that minimize high-frequency copper losses, reduce thermal dissipation, and maximize energy efficiency.
As power electronics transition toward higher operating frequencies (ranging from 50 kHz to several megahertz) to achieve compact form factors and higher efficiency, standard single-strand enameled wires suffer from severe skin effect and proximity effect. Natural Silk Covered Litz Wire (USTC series) has emerged as the definitive solution for South Korea's leading Tier-1 electronics and automotive suppliers seeking ultra-low loss conductor performance paired with exceptional structural stability.
Why Natural Silk Serving Matters for High-Frequency Conductors
Unlike synthetic outer jackets, natural silk serving (USTC) provides an ultra-thin, highly flexible outer layer that firmly binds twisted enameled fine strands together. Natural silk offers superior thermal stability, low dielectric constant, and outstanding mechanical durability. This allows winding coils into extremely tight radii without damaging strand insulation or altering wire geometry—an essential requirement for high-density EV transformers and wireless charging transmitters developed in South Korea.
Key Advantages of Natural Silk Covered Litz Wire (2USTC / USTC)
Tianjin Ruiyuan Electric Material Co., Ltd. supplies high-precision Natural Silk Covered Litz Wire engineered to meet stringent international standards (IEC, NEMA, JIS). Our USTC wires combine ultra-fine polyurethane (UEW) or polyesterimide (EIW) enameled copper strands served with natural silk fibers, unlocking distinct advantages:
Localized Application Scenarios in South Korea
Korean industrial tech clusters utilize our natural silk covered litz wire across diverse advanced hardware applications:
- EV Wireless Power Transfer (WPT) & On-Board Chargers (OBC): Installed in resonant transmitting and receiving coils for electric vehicle wireless charging pads, achieving efficiency rates exceeding 95%.
- High-Frequency Transformers & Inductors: Utilized by power module manufacturers in Suwon and Gumi for ultra-thin flat transformers, server power supplies, and semiconductor fabrication equipment.
- High-End Audio Equipment & Medical Transducers: Adopted in premium audio cable assemblies and medical ultrasound imaging probes where signal purity and zero-loss transmission are mandatory.
- Induction Heating (IH) Coils: Integrated into high-efficiency consumer electronics and industrial induction heating systems requiring high current carrying capacity and minimal thermal buildup.
About Us & Corporate Excellence
Tianjin Ruiyuan Electric Material Co., Ltd. (Ruiyuan)
Tianjin Ruiyuan Electric Material Co,. Ltd. (Ruiyuan) was established in 2002. In the past 20 years, we have been thinking one question ‘How Satisfy Customer’ that drives us to expand product lines from fine enameled copper wire to litz wire, USTC, rectangular enameled copper wire, triple insulated wire and also guitar pickup wire, 6 main types with over 20 kinds of magnet wire. Here you will enjoy One Stop Purchase Service with cost effective price, and quality is the last thing you need to concern. We wish to help you reduce your costs and save your time, and establish long term Win-Win cooperation.
What we have been doing in 20 years is pursuing our operation philosophy ‘Customer Oriented, Innovation brings more Value’ that is not a slogan, but a part of our DNA. Not like ordinary magnet wire providers who only give specified size ranges, we are a true solution provider that requires us to be more professional on wires, insulation materials, and your custom applications.
Here we want to share one story shortly
One of our European customers needed high frequency litz wire used in wireless charging of automotives, requiring excellent solvent resistance and a flame rate following UL94-V0. The standard insulation could not meet the requirement; they had a custom solution, but the price was too high. Finally, our R&D team proposed an innovative solution after full discussion: ETFE insulation extruded on the surface of litz wire, which perfectly solved all the problems after one year of verification. The project lasted two years, and the wire has been in mass production since this year.
Our Advanced Manufacturing Facility
SUCH CASE IS PREVALENT IN OUR COMPANY, THAT FULLY DEMONSTRATE OUR ADVANTAGES ON TECHNOLOGY AND SERVICE. BESIDES THIS, THESE NUMBERS TELL MORE ABOUT US:
One-Stop Solution
100% Open and Delivering On-Time.
As a leading supplier of enameled copper wire and specialized litz wire, we have earned a reputation for providing a superior customer experience, first-class quality control, and seamless international cooperation.
Exquisite, Quality, All For The Customer!
Ruiyuan attracts many outstanding technical and management talents, and our founders have built the best team in the industry with our long-term vision. This is our guarantee to provide quality products and services to all our customers in South Korea and worldwide.
Explore Features
Frequently Asked Questions (FAQ)
Everything you need to know about purchasing, custom specifications, and quality guarantees for our magnet wires.
Comprehensive Product Range
Explore our full line of specialized litz wires, triple insulated wires, and ultra-thin magnet copper wires.
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