2USTC-F 0.1mm x660 Strands Overall Dimension 3mmx3mm Square Silk Covered Litz Wire
This is a custom square silk covered Litz wire, but instead of natural silk, it’s wrapped in nylon yarn. Polyester yarn options are also available if preferred.
Litz wire is made of 660 strands of 0.1 mm enameled copper wire.s, offering excellent flexibility and conductivity. This wire is rated for 155°C, which generally meets the heat requirements of most applications. However, if a higher temperature rating is required, we also offer an option rated for 180°C.
·IEC 60317-23
·NEMA MW 77-C
·customized according to customer requirements.
This square silk covered litz wire measures just 3mm per side, effectively maximizing space utilization during the winding process. It’s particularly well-suited for transformer winding, where efficient space management and thermal performance are crucial. We can design and manufacture silk covered litz wire to your specific needs, ensuring you receive a product that perfectly meets your requirements.
When producing litz wire, we typically use enameled copper wire with diameters ranging from 0.03 mm to 0.5 mm. This flexibility in wire diameter allows us to meet a wide range of application and performance requirements. Our litz wire can be twisted with an impressive number of strands, up to 12,700, ensuring optimal conductivity and reducing skin effect.
For custom orders, the minimum order quantity is 10 kg, ensuring we can meet both small- and large-scale production needs. Our commitment to quality and precision means you can count on us to deliver products that meet your performance standards and application requirements. Whether you require a specific wire diameter, strand count, or winding method, we have a solution to meet your unique needs.
Item No. | Outer diameter
of single wiremm |
Conductor
dia. mm |
Widthmm | Thicknessmm | ResistanceΩ /m | Breakdown voltage
V |
Techrequirement | 0.107-0.125 | 0.10±0.003 | 3.0±0.2 | 3.0±0.2 | ≤0.003824 | ≥500 |
Sample 1 | 0.110-0.113 | 0.097-0.099 | 3.0-3.10 | 3.0-3.13 | 0.003568 | 1000 |
Sample 2 | 0.110-0.113 | 0.097-0.099 | 3.02-3.13 | 3.02-3.15 | 0.003522 | 700 |
5G base station power supply

EV Charging Stations

Industrial Motor

Maglev Trains

Medical Electronics

Wind Turbines












Founded in 2002, Ruiyuan has been in the manufacture of enamelled copper wire for 20 years.We combine the best manufacturing techniques and enamel materials to create a high-quality, best-in-class enameled wire. The enameled copper wire lies at the heart of technology we use every day – appliances, generators, transformers, turbines, coils and much more. Nowadays, Ruiyuan has the global footprint to support our partners in marketplace.

Our Team
Ruiyuan attracts many outstanding technical and management talents, and our founders have built the best team in the industry with our long-term vision. We respects the values of each employee and provides them with a platform to make Ruiyuan a great place to grow a career.



