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Insulated Flexible Copper Busbar Suppliers in China - Custom Factory Solutions for Switch Cabinets

Introducing our high-quality insulated flexible copper busbars, expertly crafted by leading suppliers and manufacturers in China. Our busbars utilize copper foil or copper braiding as conductors, enveloped in a range of insulating materials to enhance performance. These busbars are designed for excellent flexibility, superior bending resistance, efficient heat dissipation, and outstanding electrical conductivity. Their convenient installation and remarkable fatigue resistance make them ideal for various electrical connection requirements, Customization is at the core of our offerings; we can tailor the busbar's length, width, thickness, number of holes, sizes, cross-sectional area, and insulating materials to suit your specific needs. Trust our China-based factory for innovative solutions that meet your technical and operational demands

    Product Structure and Materials For Insulated Flexible Copper Connector

    Conductor Section

    Material: T2 purple copper foil / copper stranded wire (copper content ≥99.95%), high purity, excellent electrical conductivity

    Structural Form:

    Laminated Type: Multiple thin copper foils are stacked together, with strong current-carrying capacity, suitable for high-current scenarios

    Twisted Type: Multiple strands of fine copper wire twisted together, with high flexibility, suitable for environments with frequent bending

    Woven Type: Copper wires are woven into a mesh, which offers the best flexibility and is suitable for complex spatial connections

    Technical Data for Insulated Flexible Copper Connector
    Product Type Laminated Insulated Copper Busbar Flexible Connection Braided Insulated Copper Busbar Flexible Connection
    Conductor Parameters

    Conductor material: T2 oxygen-free copper

    Spec 1: (15.5×0.8×2mm), cross-sectional area 24.8mm²

    Spec 2: (20×1×5mm), cross-sectional area 100mm²

    Spec 3: (40×1×8mm), cross-sectional area 320mm²

    Spec 4: (50×1×10mm), cross-sectional area 500mm²

    Conductor material: T2 oxygen-free copper (copper content >99.95%)

    Conventional monofilament diameter: 0.15mm (0.05–0.25mm available)

    Surface treatment: Bare copper / Tin plating / Nickel plating

    Spec 1 (Small): Cross-sectional area 30mm²

    Spec 2 (Medium): Cross-sectional area 150mm²

    Spec 3 (Large): Cross-sectional area 500mm²

    Insulation Parameters

    Material: PVC / Heat shrink tubing (EVA/PE)

    Dielectric strength > 20kV/mm

    Flame retardant grade: UL94 V-0

    Operating temperature: -40℃ to 125℃

    Material: Silicone rubber / Fluoroplastic

    Dielectric strength > 23kV/mm

    Flame retardant grade: UL94 V-0

    Operating temperature: -45℃ to 200℃

    Current Capacity (A)

    Spec 1: 125A (△T=20K) / 200A (△T=50K)

    Spec 2: 300A (△T=20K) / 490A (△T=50K)

    Spec 3: 600A (△T=20K) / 920A (△T=50K)

    Spec 4: 750A (△T=20K) / 1300A (△T=50K)

    Spec 1: 150–300A

    Spec 2: 600–1000A

    Spec 3: 1500–3000A

    Adapt to Scenarios

    New energy vehicle battery packs

    UPS systems

    High and low voltage switch cabinets

    Rail transit traction converters

    Industrial electric arc furnaces

    Energy storage power stations

    Core Advantage

    The laminated structure reduces the skin effect, with less contact between the insulating layer and the conductor, high flexibility, and the ability to be folded and twisted

    Strong seismic resistance, suitable for equipment vibration and thermal expansion and contraction, with better high-temperature resistance than laminated type

    The Application for Insulated Flexible Copper Connector
    ⚡
    Internal Connection of Switch Cabinets

    Replacing traditional hard connection, simplifying installation and reducing mechanical stress

    🔌
    Transformer Outgoing Line Connection

    Adapt to slight displacement of the transformer and reduce the risk of fatigue fracture at the connection point

    🚗
    Internal Connection of the Charging Pile

    Heat-resistant and moisture-resistant, ensuring the stability of high-power charging

    🌬️
    Wind Power Generation Equipment

    Resistant to low temperatures (-60℃) and strong wind vibration, ensuring safety during high-altitude operations

    Insulated Flexible Copper Connector
    Package & Shipping For Insulated Copper Flexible Connector
    Package & Shipping
    Frequently Asked Questions (FAQ)
    1 What is the difference between laminated and braided insulated flexible copper connectors?
    Laminated connectors consist of multiple thin copper foils stacked together, offering strong current-carrying capacity and reduced skin effect — ideal for high-current applications such as battery packs and switch cabinets. Braided connectors are woven from fine copper wires, providing superior flexibility, seismic resistance, and higher temperature tolerance, making them better suited for rail transit, arc furnaces, and energy storage systems.
    2 What copper material is used in insulated flexible copper connectors?
    Both laminated and braided types use T2 oxygen-free copper with a copper content of ≥99.95%. This ensures excellent electrical conductivity, low resistance, and long-term reliability under high-current conditions.
    3 What insulation materials are available and what temperatures can they withstand?
    Laminated connectors use PVC or heat shrink tubing (EVA/PE), rated for -40℃ to 125℃. Braided connectors use silicone rubber or fluoroplastic insulation, rated for -45℃ to 200℃. Both meet UL94 V-0 flame retardant standards with dielectric strength exceeding 20kV/mm.
    4 What current capacities are available for insulated flexible copper connectors?
    Laminated types range from 125A to 1300A depending on specification and temperature rise (△T). Braided types cover 150A up to 3000A across three size categories (Small, Medium, Large), making them suitable for both low and ultra-high current applications.
    5 Can insulated flexible copper connectors be used in outdoor or harsh environments?
    Yes. Braided types with silicone rubber insulation can withstand temperatures as low as -45℃ and as high as 200℃, as well as strong vibration and mechanical stress. Wind power generation equipment applications confirm suitability at -60℃ and under strong wind vibration conditions at high altitudes.
    6 What surface treatment options are available for braided copper connectors?
    Braided insulated copper connectors are available with three surface treatment options: bare copper, tin plating, and nickel plating. Tin plating improves corrosion resistance and solderability, while nickel plating provides enhanced oxidation resistance and is suitable for high-temperature or chemically demanding environments.