2USTC-F 0.1mmx300 Nylon Serving Litz Wire for Transformer Copper Litz Wire
This customized nylon serving litz wire is engineered for high-frequency transformer applications. The litz wire consists of 300 strands of 38 AWG (0.1 mm) enameled copper wire, carefully twisted together to form a flexible and efficient bundle. Each strand is individually insulated, which minimizes eddy current losses and skin effect at high frequencies. The entire bundle is then wrapped with a durable outer layer of nylon yarn, providing mechanical protection and insulation integrity. Alternatively, polyester yarn is also available upon request.
·IEC 60317-23
·NEMA MW 77-C
·customized according to customer requirements.
The silk covered litz wire has a maximum overall diameter of 2.65 mm and a minimum withstand voltage of 1100 V. For detailed electrical and mechanical specifications, please refer to our test report. We support small-batch customization with a minimum order quantity of 20 kg, making it ideal for prototype development or specialized production runs.
This nylon serving litz wire is particularly suitable for transformer windings, especially in switch-mode power supplies, high-frequency inverters, and resonant converters. In such applications, the litz construction significantly reduces AC resistance, improving energy efficiency and reducing heat generation. The nylon serving adds abrasion resistance and electrical isolation between winding layers, while the compact diameter allows for higher packing density within the transformer core window. With its excellent voltage rating and customizable options, this wire ensures reliable performance in demanding power conversion circuits.
| Item
|
Tech
requirement |
Sample 1 | Sample 2 |
| Our diameter of single wire
mm |
0.107-0.125 | 0.110 | 0.113 |
| Conductor diameter mm | 0.10±0.003 | 0.098 | 0.100 |
| OD mm | Max.2.65 | 2.28 | 2.38 |
| Resistance Ω /m(20℃ ) | ≤0.007937 | 0.007391 | 0.007400 |
| Breakdown voltage V | ≥1100 | 2500 | 2800 |
| Pitch | 47±3 | √ | √ |
| Pinhole test | 69 faults/6m | 18 | 14 |
| Solderability | Temp. 390±5℃ 8s
Smooth surface, no pinholes, no residue |
√ | √ |
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.














