Extruded ETFE Insulation Litz Wire 0.21mmx7 Strands TIW wire
Extruded ETFE litz wire is a specialized cabling solution designed for high-performance applications, particularly those in high-voltage environments.
This litz wire has an internal single-wire diameter of 0.21 mm and made of 7 strands twisted together. This construction enhances flexibility and reduces skin-effect losses, making it ideal for high-frequency applications.
The wires are insulated with ETFE (ethylene tetrafluoroethylene), a high-performance polymer renowned for its exceptional heat and chemical resistance. The ETFE insulation is applied using an extrusion process, ensuring a uniform and durable coating, providing superior protection against environmental factors such as moisture, chemicals, and extreme temperatures. One of ETFE's key advantages is its high dielectric strength, enabling the insulation to withstand a breakdown voltage of up to 14,000V. This makes extruded ETFE stranded wire particularly suitable for high-voltage transformers and other critical electrical equipment, ensuring reliable performance and safety.
Here is the test report of ETFE litz wire 0.21MMX7
Characteristics | Test Standard | Test result | ||
Conductor Diameter | 0.21±0.003MM | 0.208 | 0.209 | 0.209 |
Min. insulation thickness | / | 0.004 | 0.004 | 0.005 |
Single wire Diameter | / | 0.212 |
0.213 | 0.214 |
Overall dimension | / | 0.870 | 0.880 | 0.880 |
Conductor Resistance | Max. 73.93Ω/KM | 74.52 | 75.02 | 74.83 |
Breakdown voltage | Min. 6KVA | 14.5 | 13.82 | 14.6 |
Elongation | MIN:15% | 19.4-22.9% | ||
Solder ability | 400℃ 3Secs | OK | OK | OK |
Conclusion | Qualified |
In addition to its high-voltage capabilities, Litz wire's twisted structure allows for better current distribution, minimizes electromagnetic interference, and improves overall efficiency. Litz wire's light weight and strong insulation properties make it an ideal choice for applications where space and weight are critical.
ETFE offers numerous advantages, including excellent resistance to UV radiation, low friction, and a wide temperature range, making it suitable for a variety of industrial applications. Its durability and chemical resistance further enhance its appeal in harsh environments.
We support customization, MOQ is 1000m,we have a professional team to provide technical support.We have a professional team to provide technical support.











Customer Oriented,Innovation brings more Value
RUIYUAN is a solution provider, which requires us to be more professional on wires, insulation material and your applications.
Ruiyuan has a heritage of innovation, along with advancements in enameled copper wire, our company has grown through an unwavering commitment to integrity, service and responsiveness to our customers.
We look forward to continuing to grow on the basis of quality, innovation and service.

7-10 days Average delivery time.
90% European and North American customers. Such as PTR,ELSIT, STS etc.
95% Repurchase rate
99.3% Satisfaction rate. Class A supplier verified by German customer.