2UDTC-F 5mmx3mm Rectangular Nylon Serving Litz Wire Product For Transformer

Short Description:

Single wire diameter: 0.125mm

Number of strands:660

Width: 5.0mm Thickness: 3.0mm

Thermal rating: class F(155°C)

MOQ: 20KG

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Introduction

Enhance your high-frequency transformer and inductor performance with our high-performance Rectangular Nylon Serving Litz Wire. Engineered for superior efficiency, this specialized Litz wire consists of 660 individual strands of 0.125mm enamelled copper wire, precision-bundled and custom-compressed into a robust rectangular profile measuring 5mm in width and 3mm in thickness. Coated with a durable nylon serving, it offers exceptional mechanical protection and thermal resistance, making it the ultimate solution for advanced power electronics, EV chargers, and renewable energy inverter systems.

Standard

·IEC 60317-23

·NEMA MW 77-C

·customized according to customer requirements.

Rectangular vs. Round Litz Wire in Transformer Winding

When designing high-frequency transformers, choosing between rectangular and round Litz wire significantly impacts performance:

Space Utilization & Fill Factor: Rectangular Litz wire offers a much higher fill factor (often exceeding 70-80%) because flat edges eliminate the gaps naturally left by round wires. This allows for more copper in a smaller window, reducing transformer size.

Proximity & Skin Effects: Rectangular profiles provide uniform surface contact and predictable magnetic field distribution, effectively mitigating high-frequency AC resistance and eddy current losses better than round Litz wire.

Thermal Performance: The flat surface of rectangular wire ensures superior thermal dissipation and tighter core contact, whereas round Litz wire tends to leave air pockets that trap heat.

Winding Considerations: While round Litz wire is more flexible and easier to bend in complex, multi-directional geometries, rectangular wire requires precise tension and controlled winding direction to maximize its space-saving and efficiency advantages in planar or custom-built transformers.

FAQ

1. What is the minimum order quantity(MOQ)?
The MOQ is 20kg.

2. What is your lead time?
The lead time is 15 days.

3. How are your products different from competitors'? What are your advantages?
We offer a full range of high-frequency magnet wire products, including litz wire, rectangular enameled copper wire, round enameled copper wire, triple-insulated wire, etc., to meet various requirements. We support small-batch customization, ensuring quality and delivery even during your R&D or startup phase.

4. What testing equipment do you have?
Laser diameter gauge, high-voltage spark tester, elongation tester, spring-back tester, withstand voltage tester, solderability tester, R esistance Tester etc.

5. Which customers or markets are your products suitable for?
Our products are ideal for applications requiring high efficiency and space-saving solutions in high-frequency AC environments, including power electronics & power supplies, EV on-board chargers, wireless charging systems, green energy, communications & IT, medical equipment, industrial robots, servo motors, etc.

6. How do you keep customer information confidential?
We can sign a non-disclosure agreement (NDA) upon request and commit to strictly abiding by its terms throughout the entire cooperation process.

Technical Data Sheet (TDS)

Product Name: Silk covered Litz Wire (Class 155)
Model: 2UDTC-F | Specification: 0.125mm x 660 Strands

Test Item	Unit	Technical Requirement	Test Sample Result
Single Wire Diameter	mm	0.137 ~ 0.145	0.138 ~ 0.141
Conductor Diameter	mm	0.125 ± 0.003	0.122 ~ 0.124
Width	mm	≤5.1	4.87 ~ 5.05
Thickness	mm	≤3.1	2.88~ 3.03
DC Resistance (@20°C)	Ω/m	≤ 0.002369	0.002298
Dielectric Strength	V	≥ 600	880
Twist Pitch	mm	65± 10	65
No.of strands		660	4435
Winding Test	-	No Cracks	OK

Application

5G base station power supply

EV Charging Stations

Industrial Motor

Maglev Trains

Medical Electronics

Wind Turbines

Certificates

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About us

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.