2UEWF 4X0.2mm litz wire Class 155 High Frequency Copper Stranded Wire For Transformer
This specialized stranded wire is carefully crafted from four strands of 0.2 mm enameled copper wire, ensuring optimal flexibility and minimal skin effect at high frequencies. The unique construction of Litz wire reduces electromagnetic interference, making it ideal for high frequency transformers and other demanding electronic applications.
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The characteristic of stranded wire, such as our high-frequency Litz wire, is that it is made up of multiple smaller wires twisted together. The individual strands of our Litz wire are solderable enameled copper, thermal rating is 155 degrees, this wire can withstand the rigors of high-performance environments, ensuring the reliability and longevity of your electrical system.
High frequency Litz wire is of particular interest in transformer applications. In high frequency transformers, energy transfer efficiency is critical. Traditional solid wires experience increased resistance and losses due to the skin effect, as alternating current tends to flow near the surface of the conductor. By using Litz wire, which is made up of multiple insulated strands, the effective surface area is increased, allowing for better current distribution and reduced losses. This results in improved efficiency and performance, making our high frequency Litz wire an essential component of modern transformer design.
Furthermore, the use of Litz wire in high-frequency applications extends beyond transformers. It is also widely used in inductors, motors, and other electronic devices where high efficiency and low losses are critical. The flexibility of our Litz wire allows for easy routing and installation in tight spaces, making it a versatile choice for engineers and designers. Whether you are developing cutting-edge audio equipment, RF amplifiers, or power supplies, our high-frequency Litz wire can provide you with the reliability and performance you need to succeed.
Outgoing test of stranded wire | Spec: 0.2x4 | Model: 2UEWF | |
Item | Standard | Sample 1 | Sample 2 |
Conductor diameter(mm) | 0.20±0.003 | 0.198 | 0.200 |
Overall diameter (mm) | 0.216-0.231 | 0.220 | 0.223 |
Pitch(mm) | 14±2 | OK | OK |
Overall Diameter | Max.0.53 | 0.51 | 0.51 |
Max pinholes Faults/6m | Max. 6 | 0 | 0 |
Max resistance (Ω/m at20℃) | Max. 0.1443 | 0.1376 | 0.1371 |
Breakdown voltage Mini (V) | 1600 | 5700 | 5800 |





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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.

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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.



