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China Suppliers - Flexible Square Copper Braided Wires from Factory for AC and High-Frequency Applications

Introducing our high-quality Square Copper Braided Wires, expertly crafted from annealed Cu-ETP copper for superior flexibility and conductivity. As a leading China supplier and factory, we provide wires that are perfect for flexible connections in motors, electrical devices, and instrumentation, particularly suited for AC and high-frequency applications. Adhering to the GB/T12970.4-2009 standard, our products come in fine wire diameters as small as 0.05mm (AWG44) and 0.10mm (AWG38), available in both bare and tin-plated finishes. With outstanding electrical conductivity, exceptional bending fatigue resistance, and impressive structural stability, our Square Copper Braided Wires are the ideal choice for brush leads, rotor connections in micro motors, and high-frequency electronic devices. Choose us for premium quality and reliable performance from your trusted China suppliers.

    Technical Data

    Material: annealed Cu-ETP wires, C11000, copper content ≥ 99.95%

    Finish: bare, tin plating

    Packing Modes: in rolls, on spools or wooden drums

    Product Display

    Square Copper Braided Wires (3)
    Square Copper Braided Wires (2)
    Square Copper Braided Wires (1)

    Type And Specification

    Type Single Wire Diameter Elongation, not less than
    BGTS 0.10mm (AWG38 ), 0.12mm 18%
    BGTSX 0.10mm (AWG38 ), 0.12mm 15%
    BGTSR 0.05mm (AWG44), 0.07mm(AWG41) 15%

    Model And Meaning

    Square Copper Braided Wires 4

    Customization Upon Request

    Round Type: Single Wire Diameter: 0.07mm(AWG41)

    Part No. Nominal Cross Section (mm²) Calculating Cross Section (mm²) Structure Calculating Outside diameter (mm) Max. DC Resistance at 20℃
    Ω/km
    Calculating weight(kg/km)
    Total Wire Number Strands×Wire Number Per Strand/Single Wire Diameter (mm) BGTSR BGTSRX
    BGTSR(X)-2 2 1.93 504 7×72/0.07 2.2 9.16 9.65 18.3
    1.93 504 7×3×24/0.07 2.2 9.16 9.65 18.6
    BGTSR(X)-3.5 3.5 3.47 903 7×3×43/0.07 2.7 5.35 5.51 33.3
    BGTSR(X)-4 4 4.01 1044 12×3×29/0.07 2.9 4.59 4.83 39.0
    4.03 1050 7×3×50/0.07 3.0 4.59 4.83 39.0
    BGTSR(X)-5 5 4.84 1260 7×3×60/0.07 3.2 3.71 3.86 46.5
    5.02 1305 15×3×29/0.07 3.2 3.71 3.86 48.5
    BGTSR(X)-6 6 5.65 1470 7×3×70/0.07 3.6 2.93 3.21 54.2
    BGTSR(X)-8 8 7.75 2016 12×3×56/0.07 4.2 2.33 2.44 73.0
    BGTSR(X)-10 10 9.69 2520 12×3×70/0.07 4.8 1.83 1.91 90.5
    BGTSR(X)-12 12 11.90 3096 12×3×86/0.07 5.4 1.50 1.60 112.2
    BGTSR(X)-16 16 15.34 3990 19×3×70/0.07 6.2 1.16 1.21 150.5

    Round Type: Single Wire Diameter: 0.05mm (AWG 44)

    Part No. Nominal Cross Section (mm²) Calculating Cross Section (mm²) Structure Calculating Outside diameter (mm) Max. DC Resistance at 20℃
    Ω/km
    Calculating weight(kg/km)
    Total Wire Number Strands×Wire Number Per Strand/Single Wire Diameter (mm) BGTSR BGTSRX
    BGTSR(X)-1 1 0.99 504 7×3×24/0.05 1.4 18.5 19.3 9.3
    BGTSR(X)-1.3 1.3 1.32 672 7×3×32/0.05 1.7 14.2 14.8 12.5
    BGTSR(X)-1.5 1.5 1.48 756 7×3×36/0.05 1.8 11.9 12.7 14.0
    BGTSR(X)-1.8 1.8 1.81 924 7×3×44/0.05 2.0 10.2 10.7 17.5
    BGTSR(X)-2 2 1.98 1008 7×3×48/0.05 2.2 9.16 9.65 19.0
    BGTSR(X)-2.5 2.5 2.30 1176 7×3×56/0.05 2.3 7.39 7.72 22.5
    BGTSR(X)-3 3 2.95 1505 7×5×43/0.05 2.6 6.16 6.43 29.0
    BGTSR(X)-4 4 3.95 2016 12×3×56/0.05 2.7 4.59 4.83 39.0
    BGTSR(X)-5 5 4.94 2520 15×3×56/0.05 3.2 3.71 3.86 48.5
    BGTSR(X)-6 6 6.26 3192 19×3×56/0.05 3.6 2.93 3.21 60.0
    BGTSR(X)-8 8 8.05 4104 19×3×72/0.05 4.2 2.33 2.44 78.5
    BGTSR(X)-10 10 10.00 5096 7×7×104/0.05 4.8 1.83 1.91 97.0
    10.07 5130 19×3×90/0.05 4.8 1.83 1.91 97.8
    BGTSR(X)-12 12 12.08 6156 19×3×108/0.05 5.4 1.50 1.60 117.0

    Product Advantages

    Ultra-high flexibility: Micro-stranded construction (single wire down to 0.05mm) ensures a small bending radius and high resistance to repeated flexing, suitable for high-dynamic applications.

    Excellent conductivity: Made of high-purity Cu-ETP copper (≥99.95%), low DC resistance, reduced power loss, especially effective for high‑frequency current transmission.

    Multiple finishes: Available bare or tin-plated. Tin plating provides effective oxidation and corrosion resistance, and improves soldering reliability.

    Standard compliance: Strictly manufactured according to GB/T12970.4-2009, ensuring consistency and traceability.

    Flexible customization: Structure, cross-section, and packing can be adjusted upon request; non-standard solutions are available.

    Operating Conditions

    Temperature range:
    –40°C to +200°C (tin-plated)

    Environment:
    Dry or moderate humidity. Avoid prolonged contact with acids, alkalis, or corrosive gases. Tin-plated version can be used in mildly corrosive environments.

    Current rating:
    Refer to the max. DC resistance values in the specification table and select the appropriate cross‑section based on actual heat dissipation of the equipment.

    Maintenance and Care

    Periodically inspect the conductor surface for oxidation, blackening, or mechanical damage, especially when used in high-humidity or chemical atmospheres.

    During installation, avoid excessive tension or kinking; keep the minimum bending radius no less than 5 times the outer diameter of the wire.

    For tin-plated products stored long‑term, use sealed packaging and store in a dry, clean environment to prevent discoloration of the tin layer.

    In high-frequency equipment, ensure that terminal crimping or soldering is secure to avoid local overheating due to high contact resistance.

    After-Sales Service

    Factory inspection reports and material certificates are provided, traceable to raw material batches.

    Technical team available to assist with selection, structural optimisation, and failure analysis.

    Small batch sample orders supported; lead time for bulk orders is usually 15–25 working days (expediting possible upon request).

    Customization Upon Request

    Zhejiang Bridgold Copper Tech Co., Ltd. is a professional leader China copper braid flat, copper braid wire, copper braid wire flat, copper braided wire, copper earth braid manufacturers and suppliers with high quality and low price. Welcome to contact us.

    Frequently Asked Questions (FAQ)

    What is the copper purity and material grade used in these braided wires?
    The wires are manufactured using high-purity annealed Cu-ETP wires (C11000) with a guaranteed copper content of ≥ 99.95%, ensuring exceptional electrical conductivity and thermal performance.
    What are the main differences between bare and tin-plated finishes?
    Bare copper provides optimal conductivity for standard indoor applications, while tin plating enhances corrosion and oxidation resistance, improves solderability, and operates stably within a temperature range of –40°C to +200°C.
    What is the recommended minimum bending radius during installation?
    To maintain product integrity and prevent fatigue damage, the minimum bending radius should be kept to no less than 5 times the outer diameter of the wire, while avoiding overtension and kinking.
    Can custom cross-sections and stranding structures be manufactured?
    Yes, full customization is supported. We can tailor the wire strand count, nominal cross-section, single wire diameter (down to 0.05mm), packaging, and terminals according to specific engineering requirements.
    Which quality standards are followed, and is traceability provided?
    All braided wires are produced in strict accordance with the GB/T12970.4-2009 standard. Complete factory inspection reports and material certificates traceable to raw material batches are supplied.
    What is the standard lead time for sample and bulk orders?
    Small batch sample orders are supported quickly for trial and evaluation. Lead time for mass production bulk orders is typically 15 to 25 working days, with expedited schedules available upon request.