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Geometrical Customization and Super-Thin Capabilities
The “super-thin customized size” characteristic sets this product apart from conventional magnet wires. Flat enameled copper wire is defined by two primary dimensions: width (W) and thickness (T). The aspect ratio (W/T) is a critical parameter that determines the wire’s suitability for specific applications.
The ability to produce thicknesses as low as 0.02mm with tight tolerances makes this wire ideal for applications requiring extreme space efficiency. For instance, a specific product measuring 0.30mm × 0.18mm demonstrates the precision achievable: actual width of 0.298mm versus a nominal 0.300mm, and thickness of 0.180mm versus nominal 0.180mm.
Performance Characteristics Space Factor and Efficiency
The rectangular cross-section of flat wire delivers a space factor up to 96%, compared to approximately 78-80% for equivalent round wire. This means that in the same winding space, flat copper wire can accommodate significantly more copper cross-sectional area, resulting in lower resistance and higher current-carrying capacity. This efficiency gain is particularly valuable in applications where physical space is at a premium.
Electrical Performance
For a typical super-thin product such as 0.80mm × 0.35mm, the conductor resistance at 20℃ is approximately 72.71 Ω/km, with breakdown voltage exceeding 0.7 kV. Elongation typically reaches 30% or higher, ensuring good winding and flexural properties. These characteristics enable reliable operation in demanding electrical environments.
Application Advantages
Flat enameled copper wire offers several distinct advantages over traditional round wire:
Improved Heat Dissipation: The larger surface area-to-volume ratio of flat conductors enables more efficient heat transfer, reducing the risk of thermal degradation in high-load applications.
Reduced Skin Effect: In high-frequency applications, the larger cross-sectional area and optimized geometry help mitigate skin effect losses, improving overall system efficiency.
Compact Design: The superior space factor enables the production of smaller, lighter, and thinner end products without compromising performance, making the wire ideal for automotive, aerospace, and portable electronics.
Technical Standards Compliance
220℃ flat enameled copper wire is manufactured to comply with international standards including IEC 60317, NEMA MW 1000, JIS C3003, and JIS C3216. These standards ensure consistent quality, performance, and safety across different manufacturers and applications.
Testing and Quality Assurance
Comprehensive testing ensures product reliability. A typical test regimen includes:
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Pinhole Testing: Maximum of 1-3 pinholes per meter, confirming insulation integrity
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Flexibility and Adhesion Tests: Winding tests without cracks or loss of adhesion
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Breakdown Voltage Testing: Minimum 0.5 kV, with typical results exceeding 1.0 kV
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