Precision Ultra Fine Copper Wire Manufacturing

Premium enameled copper wire, rectangular wire, Litz wire & specialty conductors from Tianjin Ruiyuan – China's pioneer in micro-thin wires down to 0.011mm. UL & RoHS certified, IEC60317 compliant.

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0.011mm

Finest Diameter

23+ yrs

Industry Experience

UL, RoHS

Certified

IEC, JIS

Standards Compliant

About Tianjin Ruiyuan

Established in 2002 and located in Tianjin – China’s second-largest port city – RUIYUAN has been a leader in high-precision copper wire manufacturing for over two decades.

We specialize in a wide range of high-quality wires including enameled round copper wire, rectangular enameled copper wire, triple-insulated wire, silk-covered Litz wire, bonding wire, and special enameled wires.

As one of the pioneers in China producing micro-thin enameled wires below 0.03mm, our R&D team brings over 20 years of market experience. In 2019, we achieved mass production of our finest wire at 0.011mm diameter.

UL & RoHS Certified Products
Compliant with IEC60317, JIS C 3202, NEMA, NW82
OEM/ODM Support Available
Global Export Since 2002

Our Premium Products

High-performance copper wires engineered for precision applications in electronics, motors, transformers, audio, and aerospace.

Ultra Fine Enameled Copper Wire

Diameter: 0.011mm – 0.08mm | Insulation: 2UEW155 | Ideal for micro-motors, sensors, and precision coils.

AWG 55 to 44 | UL & RoHS Certified

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Rectangular Enameled Copper Wire

Dimensions: 2.0mm x 0.1mm to 1.8mm x 0.2mm | High fill factor for EV motors, transformers, and inductors.

AIW220, UEWH, Class 220 | High Temp Resistant

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USTC Litz Wire

Stranded: 0.05mm x 225 | Silk-covered for high-frequency transformers, switch-mode power supplies.

Low skin effect | High efficiency

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Self Bonding Enameled Wire (UEW-F)

Hot-wind adhesive coating for coil integrity without bobbins. Ideal for automotive and industrial coils.

2UEW-F, 3UEW-F | Easy Soldering

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Voice Coil Wire

Precision 0.036mm to 0.15mm enameled wire for loudspeakers, headphones, and high-fidelity audio systems.

46 AWG to 36 AWG | Polyurethane Coating

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Guitar Pickup Wire

Heavy Formvar / Plain Enamel insulated wire for electric guitar and bass pickups. Rich tonal clarity.

Classic tone | Hand-wind compatible

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Triple Insulated Wire (FIW)

Multi-layer insulation for safety-critical applications. Meets IEC 60317-47 standards.

High dielectric strength | Compact design

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High Purity Copper (4N–7N)

C10100 Electrolytic Oxygen-Free Copper up to 99.99999% purity. For ultra-conductive applications.

6N, 7N Grade | For OCC & specialty wires

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Why Choose RUIYUAN?

Engineered for performance, reliability, and precision across industries.

Micro-Thin Expertise

Mass production of wires down to 0.011mm – among the finest in China.

Certified Quality

All products UL, RoHS compliant and meet IEC, JIS, NEMA, and NW82 standards.

23+ Years Experience

Established in 2002 with a dedicated R&D team and full OEM/ODM capabilities.

Global Export

Trusted by clients in electronics, automotive, audio, and aerospace industries worldwide.

Frequently Asked Questions

What is the smallest wire diameter you produce?

We mass-produce ultra-fine enameled copper wire down to 0.011mm (AWG 55), one of the finest in China.

Are your products RoHS and UL certified?

Yes, all our wires are UL listed and RoHS compliant, meeting international environmental and safety standards.

Can you customize wire dimensions and insulation?

Absolutely. We offer full OEM/ODM services including custom diameters, rectangular profiles, insulation types, and spooling.

What applications are your wires used in?

Our wires are used in motors, transformers, inductors, audio equipment, guitar pickups, aerospace sensors, and high-frequency electronics.

Do you provide samples?

Yes, we offer sample reels for evaluation. Contact us directly to request samples based on your specifications.

Get in Touch

For quotes, samples, or technical inquiries, visit our official website to connect with our team.

Company: Tianjin Ruiyuan Electric Material Co., Ltd.

Phone: +86 22 88333335

WhatsApp: +86 158 0229 5822

Contact Person: James Shan

Established: 2002 | Location: Tianjin, China

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