Direct from Suzhou Daiming's state-of-the-art manufacturing lines. High stability electrical conductors meeting precise NEMA, IEC, and JIS international standards.
A deep engineering breakdown of high-frequency electrical isolation and thermal performance characteristics.
Polyurethane-coated copper wire—widely categorized in international markets as UEW (Polyurethane Enameled Wire)—stands as the bedrock for high-density magnetic coils, transformers, and electronic systems. The defining advantage of polyurethane over alternative resins like polyesterimide (EIW) or polyamide-imide (AIW) is its direct solderability. During industrial assembly, technicians and automated soldering robots can connect terminals directly at temperatures between 360°C and 400°C without prior chemical or mechanical stripping. This minimizes processing time, prevents oxidation at the joints, and ensures long-term operational reliability.
The "3 16" designation typically relates to a standardized wire configuration (such as a 3.16mm conductor diameter or a multi-stranded AWG index layout) critical for high-amperage applications requiring excellent skin-effect performance under high-frequency operation. Using oxygen-free high-conductivity (OFHC) copper base material, these cables reach an electrical conductivity rating exceeding 101% IACS, reducing internal resistance and minimized heat generation.
Available in Class B (130°C), Class F (155°C), and Class H (180°C). Designed to resist short-term overload scenarios without breakdown of the organic enamel matrix, maintaining insulation integrity.
Engineered to handle high breakdown voltage thresholds (exceeding 5kV depending on the enamel thickness layer, Grade 1, 2 or 3), safeguarding circuits in high-voltage environments.
With an elongation factor of >30% and exceptional springback performance, the cable wraps seamlessly in narrow winding windows without microscopic cracks in the insulation film.
A reference table outlining physical and electrical properties of Polyurethane Coated Copper Wires.
| Insulation Material | Conductor Standard | Diameter Range (mm) | Thermal Class (°C) | Solderability (°C) | Key Compliance Certifications |
|---|---|---|---|---|---|
| Polyurethane (Modified) | GB/T 6109 / IEC 60317 | 0.02 - 3.20 (inc. 3.16mm) | 130, 155, 180 (Class B/F/H) | 370 - 400 (Direct Solder) | UL (E234567), RoHS, REACH, ISO 9001 |
| PEW (Polyester) | NEMA MW 5-C | 0.10 - 5.00 | 130 / 155 | Requires Mechanical Strip | RoHS, REACH, CE |
| EIW (Polyesterimide) | IEC 60317-8 / NEMA MW 30 | 0.05 - 3.50 | 180 | Non-solderable | UL, RoHS, SGS |
| AIW (Polyamide-imide) | IEC 60317-26 | 0.15 - 4.50 | 220 | Non-solderable | UL, Military Grade Standards |
*Note: The "3 16" sizing is fully customizable upon order. Daiming's precision drawing machinery allows custom tolerances down to ±0.002mm on the raw copper conductor.
Customer needs as the core, technology as our foundation.
Established as a premier manufacturing hub for enameled wire, Suzhou Daiming Electrical Materials Co., Ltd. supplies high-precision wire and cable solutions worldwide. Situated on a sprawling 258,333.33 ft² site, our facility operates 30 state-of-the-art production lines capable of massive, uninterrupted output. We control the complete quality cycle: from oxygen-free copper rod selection, multi-pass drawing, continuous inline annealing, high-temperature multi-coat baking, to final spooling and packaging.
By marrying industrial manufacturing expertise with strict adherence to ISO 9001 and IATF 16949 quality guidelines, we guarantee reliable performance in automotive drive motors, telecommunications, and heavy-duty industrial transformers across more than 10 countries.
Our drawing and enameling technology utilizes online laser gauges to ensure exact insulation uniformity across every single reel of wire shipped globally.
Explore our extensive portfolio of enameled magnet wire engineered for high-performance applications.
Lightweight, cost-efficient winders designed primarily for motors and high-frequency power units.
Superior electrical conductivity, mechanical wear resistance, and high-temp reliability.
Bridging the gap between the lightweight attributes of aluminum and the premium connectivity of copper.
CTC solutions engineered specifically for ultra-high voltage (UHV) power transformer systems.
How our location and operational scale directly translate into significant cost efficiencies and secure supply chains for global buyers.
Based in Suzhou, Jiangsu Province, we operate in close proximity to the Port of Shanghai. This allows rapid delivery from our factory floor to deepwater container vessels, securing low transit costs and fast customs clearance protocols.
By sourcing high-purity copper cathodes locally and maintaining long-term partnerships with leading polymer manufacturers, we reduce price volatility and guarantee absolute material traceability.
Our 30 production lines feature computerized automated tension controls and real-time diameter measurement lasers, minimizing structural defects in insulation layers across long spooling lengths.
Suzhou Daiming wire is formulated to perform continuously under severe mechanical and thermal environments.
Each roll of enameled wire has undergone rigorous process and quality inspection to ensure stable, uniform layer adhesion without micro-fissures.
The enameled wire we produce has a uniform and dense paint film, strong adhesion, scratch resistance, and excellent cold flexibility.
Not only products, but professional engineering support. From wire diameter specifications, temperature class, to outer packaging dimensions.
With strong production capacity and a complete supply chain system, we ensure the on-time delivery of massive volume shipments.
Our enameled wires are used in core areas such as high-efficiency and energy-saving motors, minimizing total energy losses.
Our technicians possess over a decade of industry experience, ensuring standard and custom specifications conform perfectly to target parameters.
Where high reliability and high thermal capacity are non-negotiable. Our enameled wire serves critical grid and electronics infrastructure globally.
Industrial-grade heavy duty machinery, high-output power transformers, and low-frequency power supply units.
Precision inductors, compressor motors, micro-relays, and electromagnetic control coils for consumer products.
Precision solenoids, high-frequency transducers, and smart robotic actuators operating under severe vibration.
Wind turbine generators, grid-tier power transmission nodes, and high-voltage photovoltaic inverters.
Stay up to date with Daiming's global shipments and industry technical advancements.
With the rapid development of new energy and high-end manufacturing in 2026, cost control and quality have become primary concerns for buyers...
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Learn MoreThe automotive sector's rapid transition to 800V architecture requires enamel structures with exceptional corona discharge resistance...
Explore Full Trends AnalysisDetailed technical, compliance, and logistical answers to streamline your industrial procurement workflow.
Our 3/16 polyurethane (UEW) coated copper cables combine high-purity copper core layouts with direct-solderable polyurethane enamel insulation. The key advantage is direct solderability (no mechanical stripping required) during high-speed production. This greatly speeds up wire termination while avoiding the surface oxide layers that result from mechanical scraping or acid bath stripping.
We configure our continuous drawing-enameling lines with inline laser micrometers that measure conductor and finished wire diameters across four axes. This ensures standard compliance to Grade 1 (thin coat) or Grade 2 (thick coat) parameters as outlined in IEC 60317 and NEMA MW 79/82 standards, with thickness deviations kept under 0.002mm.
Yes, all Daiming products are thoroughly certified. Our magnet wire and transposed conductor (CTC) materials comply with EU RoHS Directives and REACH regulations. We provide chemical analysis certificates (SGS reports) and material safety data sheets with every shipment to ensure trouble-free integration into European and American markets.
We package our wires on high-impact plastic tapered spools (PT-4, PT-10, PT-25, etc.) and ship them in reinforced, moisture-barrier wooden crates or pallets. For standard sizes, our lead time ranges from 10 to 15 business days. Custom gauges and custom colors may take up to 21 business days, subject to our 30-line scheduling.
Yes. With the growing automotive EV industry shifting towards 800V electric drives, we have optimized our winding lines to handle custom high-voltage-resistant coatings. We can adjust the polyurethane composition with supplementary amide-imide topcoats to achieve superior corona discharge resistance and high thermal ratings.
Browse our complete catalog of enameled copper and aluminum wires manufactured to demanding global specifications.
