USTC Litz Wire 0.03mm Magnet Wire 4000 Strands Silk Covered Copper Litz Wire for High-Frequency Transformer Windings

In the design of high frequency transformers, especially for today's switch-mode power supplies (SMPS), resonant converters, and flyback topologies, the winding losses represent a key limitation on efficiency and thermal performance. Our Ultra-Fine 0.03mm x 4000 Strands Natural Silk Covered Litz Wire is specifically designed to tackle these exact issues, providing the best AC loss mitigation in the industry for challenging transformer applications.

Advanced Construction for Minimized AC Resistance
View of the multi-strand copper conductor layer: 4,000 individually insulated solderable enameled copper strands, with a diameter of only 0.03mm each. The lays of the strands are twisted in a computed pitch that guarantee a constant current equalization among the whole bunch. Winding a high-frequency transformer this way reduces both skin effect and proximity effect, which are the major sources of eddy currents losses in solid conductors. The natural outer wrapping of silk, The dual function of this wrapping act as extra dielectric barrier in between the layers of the winding and a flexible cushion that protect the delicate fine strands from breaking on the winding process, lowering the break age rate and increasing production yield.

Critical Benefits for Transformer Design
When used in transformer windings, this Litz wire provides three concrete benefits. First, it significantly reduces AC resistance (Rac) at the operating frequencies of 50kHz to a few MHz, resulting in less copper losses (I²R) and therefore cooler operating temperature. Second, thanks to the less heat generation, designers can increase power density by putting more watt into smaller transformer core. Third, the silk natural insulation has good dielectric strength and it can keep integral in high voltage stress so it can be used for primary and secondary winding of isolated power converter.

Beyond Transformers – Extended Versatility
Although transformer windings are great strength, this wire is very well-suited for use in other high frequency passive parts. It finds extensive use in high-current inductors for DC-DC converters, common-mode chokes for EMI filtering and planar magnetics where flexibility is required. The combination of ultra-fine stranding and silk insulation also provides the best solution for audiophile output transformers and medical grade power supplies where performance and low distortion is a must. Full Customization Based On Your Winding Need We understand your transformer design can be anything from a tiny flyback transformer for a consumer electronic product to a huge traction transformer for your industrial drives.Anything in between Just ask We're open to any sort of modification.

Full Customization Tailored to Your Winding Requirements
While transformer winding wire is made for strength, it is well suited for other high frequency based components. It is widely used in high‐current inductors for DC‐DC converters, common‐mode chokes for electromagnetic interference (EMI) filtering, and planar magnetics in applications demanding flexibility. With its ultra-fine stranding technology and the use of silk as insulation material, it is also the recommended solution for audiophile output transformers and medical grade power supplies where high-performaces and low-distortion are a must. Total Customization on Your Winding Requirement We realize your transformer design could be as small as a tiny flyback transformer for a consumer electronic device, or as large as a giant traction transformer for your industrial drives.Whatever in the middle Just ask We can modify anything.

We know that R&D departments usually need small quantities for prototyping and testing. We are proud to support small-batch custom orders and provide fast turnaround for sample requests. Whether your requirements are for a handful of meters for laboratory testing, or for a full production run for your next generation of power supplies, our engineering team is standing by to work with you. Get in touch with us today and we will create a customized Litz wire solution to maximize your transformer’s efficiency, reliability, and cost-effectiveness.