Explore our core selection of high-grade enameled wires and conductors, built for maximum thermal stability and electrical performance.
Polyurethane coated wire (commonly designated as UEW in magnet wire standards) is the cornerstone of modern precision electromagnetic induction applications. Because of its unique self-fluxing property—allowing direct soldering at temperatures ranging from 360°C to 480°C without requiring manual mechanical enamel stripping—UEW is critical in modern manufacturing where reliability, speed, and clean wire connections are highly scrutinized.
Traditional polyester (PEW) or polyesterimide (EIW) coatings require chemical or physical abrasion to remove the insulation layer before termination. Under high-throughput conditions, mechanical stripping poses risks of micro-nicks on fine conductor cores, which act as stress concentrators during thermal cycling. Polyurethane coatings undergo rapid thermal depolymerization during soldering, vaporizing into non-corrosive byproducts and leaving a clean, highly conductive copper or aluminum joint without damaging the inner wire matrix.
As the international power grid upgrades to higher-frequency, solid-state transmission designs and electric vehicle components switch to higher voltage architectures (e.g., transition from 400V to 800V platforms), the thermal and mechanical demands on enameled wire are changing. Traditionally classified under thermal ratings of 130°C and 155°C, advanced polyurethane coatings now routinely hit Class 180 thermal levels. Modern modifications involve blending polyurethane with polyesterimide or introducing nano-scale additives to enhance raw dielectric properties and suppress high-voltage corona discharges.
Simultaneously, the demand for reduction in equipment footprint and weight has driven the utilization of Copper-Clad Aluminum (CCA) and pure Enameled Aluminum Wire. Enameled aluminum wire, specifically class 180 PEW/UEW/EIW/AIW, yields major weight reduction benefits in structural designs, saving up to 45% weight compared to traditional copper coils. This is critical for aerospace actuators, micro-drones, automotive electronic assemblies, and consumer electronics.
Modern polyurethane enamel is composed of blocked isocyanate compounds and polyols. During the baking process in our vertical and horizontal enamel towers, the blocking agent is released, enabling cross-linking that yields a tough, elastic polymer coating. When subjected to the temperature profile of a solder bath, this cross-linked matrix unzips cleanly. The balance between thermal resistance during operation and easy breakdown during soldering represents the peak of modern polymer engineering.
| Thermal Class | Enamel Composition | Solderability Range | Main Applications |
|---|---|---|---|
| Class 130 (B) | Standard Polyurethane | 360°C – 390°C | Relays, small motors, solenoid coils, ignition components |
| Class 155 (F) | Modified Polyurethane | 370°C – 400°C | Transformers, high-frequency inductors, medical devices |
| Class 180 (H) | Polyesterimide-modified PU | 390°C – 450°C | Automotive electronics, electric drive motors, sensors |
Strategic purchasing departments worldwide are prioritizing three metrics when selecting high-precision magnet wire suppliers: chemical stability (compliance with RoHS, REACH, and UL certification), dimensional tolerance consistency (controlled via continuous laser micrometers), and supply chain flexibility. Industrial OEMs in North America, Europe, and Asia-Pacific require suppliers to show evidence of rigorous quality testing protocols—such as high-voltage pinhole tests, springback angle metrics, thermal shock resilience, and breakdown voltage (BDV) characteristics. In highly dynamic markets where raw copper and aluminum prices fluctuate daily, partnering with a manufacturer that maintains high capacity and direct material integration is essential.
Suzhou Daiming adheres to international industry standards for high-performance applications.
Customer Needs as the Core: Providing Globally Certified Magnet Wire Solutions
Suzhou Daiming Electrical Materials Co., Ltd. is a leading manufacturer of high-quality enameled wires, including enameled aluminum wires, enameled copper wires, and enameled copper-clad aluminum wires. Situated on a sprawling 258,333.33 ft² site, our advanced production facility houses 30 state-of-the-art production lines. This robust infrastructure enables us to maintain a stable and high-volume output, ensuring consistent supply to meet global market demands. With strict quality control at every stage, from raw material inspection to final product testing, we uphold the highest industry standards, guaranteeing the durability and performance of our enameled wires.
Our team members have over ten years of industry experience and are proficient in product characteristics, international standards, and the processes required to manufacture high-grade enameled wire.
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Combining automated material processing and strict quality parameters to provide global clients with reliable supply pipelines.
Each roll of enameled wire undergoes strict process control and quality inspection to ensure stable adhesion, high breakdown voltage, and zero surface defects.
The enameled wire we produce features a uniform and dense paint film with strong adhesion, scratch resistance, and excellent mechanical flexibility.
Not only standard products, but also customized technical support. We match wire diameter specifications and temperature ratings to your exact requirements.
With strong production capacity across 30 state-of-the-art lines and a complete supply chain system, we ensure on-time delivery for large global orders.
Our enameled wires are utilized in core areas such as high-efficiency, energy-saving motors, high-frequency charging systems, and electric drivetrains.
Comprehensive engineering designs tailored for complex high-voltage and high-current industrial systems.
Our four major product families are engineered for specific magnetic applications. The Enameled Aluminum Wire series offers extreme weight reduction and high cost-efficiency, ideal for home appliance motors and distribution transformers. The Enameled Copper Wire series provides maximum electrical conductivity and superior space factor performance, optimized for micro-motors, automotive starters, and high-frequency inductors. The Copper Clad Aluminum (CCA) Enameled Wire merges the weight advantages of aluminum with the solderability and contact reliability of copper, providing a balanced cost-reduction alternative. Finally, the Enameled Transposed Conductor (CTC) range is specifically designed for ultra-high voltage (UHV) power transformers, minimizing eddy current losses under high-frequency conditions.
With strict quality control at every stage, from raw material inspection to final product testing, we uphold the highest industry standards, guaranteeing the durability and performance of our enameled wires.
Provide customers with professional support throughout the entire process. Stay updated with the latest technological developments and shipment schedules.
With the rapid development of new energy and high-end manufacturing in 2026, cost control and quality assurance have become central goals for major electrical system design groups.
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Faced with operational challenges caused by volatile copper commodity prices, copper-clad aluminum (CCA) enameled wire has emerged as a reliable replacement for cost reduction.
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New Overseas Shipment: High-quality Continuously Transposed Conductor (CTC) lines have been exported to Turkey, supporting primary grid transformation projects.
Learn More →Technical solutions and selection advice from our senior application engineers.
The defining advantage of Polyurethane (UEW) enameled wire is its self-fluxing or solderable property. Winding connections can be made in a solder bath (typically at 370°C to 450°C) without the need to mechanically scrape or chemically strip the insulation coating beforehand. In contrast, Polyester (PEW) coatings have higher thermal degradation thresholds and require physical or chemical stripping before soldering. UEW is ideal for high-density components with numerous connection points, such as relay coils, high-frequency inductors, and micro-motors.
We deploy dual-axis online laser micrometer monitoring systems across all our 30 production lines. The system continuously measures the bare wire diameter and the finished outer diameter after each enamel pass. If the coating thickness deviates from preset specifications (often within ±0.001mm), the enamel pump speed and oven temperatures automatically adjust. Additionally, we conduct regular springback and concentricity tests on finished spools to verify consistent dielectric protection.
Yes, but it requires specific engineering adjustments. Class 180 enameled aluminum wire reduces coil weight by up to 45%, which is highly beneficial for automotive weight reduction programs. However, because aluminum's electrical conductivity is roughly 61% of copper's, a slightly larger wire diameter or modified slot design is required to achieve the same resistance parameters. Enameled aluminum wire is suitable for auxiliary motors, ignition coils, and alternator systems where space permits.
Continuously Transposed Conductors (CTC) consist of multiple rectangular enameled copper wires assembled in a specific transposed arrangement, wrapped with paper insulation. This structure minimizes eddy current losses and helps equalize heat distribution within transformer windings. CTCs are crucial components in high-capacity power transformers, wind turbine step-up units, and transmission grid stations.
Yes, all magnet wires manufactured by Suzhou Daiming comply with RoHS (Restriction of Hazardous Substances) and REACH directives. Our formulations do not contain heavy metals or hazardous solvents, making our enameled wires safe for consumer electronics, automotive assemblies, and medical instrumentation worldwide.
Review our specialized enameled wire categories, designed to meet rigorous standards and custom project requirements.
