2UEW-H 0.1mm 38 AWG *180 Strands enameled Copper Litz Wire For Transformer
This custom stranded copper litz wire is engineered for high frequency and high efficiency applications, particularly transformer windings. Each wire is constructed from 180 individual strands, with a single strand diameter of 0.1 mm, carefully twisted together to form a flexible, high performance conductor.
The entire assembly is rated for continuous operation at 180 °C, making it suitable for demanding thermal environments. Moreover, this litz wire is fully solderable, simplifying termination and connection processes during manufacturing or repair.
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·IEC 60317-23
·NEMA MW 77-C
·customized according to customer requirements.
Reduced AC Losses – The fine, individually insulated strands minimize skin and proximity effects at high frequencies, significantly lowering AC resistance compared to solid wire. This translates into cooler, more efficient transformers.
Excellent Flexibility – The multi strand construction makes the wire exceptionally pliable, facilitating winding in tight spaces and around complex core geometries without damaging the insulation.
High Thermal Reliability – With a 180 °C thermal class, the wire maintains stable electrical and mechanical properties even under prolonged heat exposure, ensuring long service life in power electronics.
Solderable Design – No need to strip individual strands before soldering; the integrated coating allows quick, reliable soldering, reducing assembly time and avoiding insulation damage.
Low MOQ for Custom Needs – We support small batch customization with a minimum order quantity of just 20 kg. This enables prototyping, smallseries production, or specialized transformer designs without the burden of huge inventories.
Whether you are developing compact switch mode power supplies, high frequency transformers, or induction heating coils, our 0.1 mm × 180 strand litz wire offers the ideal balance of performance, processability, and cost effectiveness. Contact us to discuss your specific winding requirements.
| Test report | ||
| Item | Requirement | Test result |
| Surface | No crack, smooth | ok |
| Conductor dia. mm | 0.1±0.003 | 0.101 |
| Outer dia. Of single wire | 0.110-0.125mm | 0.112 |
| No. Of strands | 180 | 180 |
| Max. OD | 1.94mm | 1.74 |
| Pitch | 23.5mm±2mm | 23.0 |
| Resistance | ≤13.62 Ω/km(20℃) | |
| Breakdown voltage V | ≥1.1kv | 3.2 |
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.















