Customized Tinned Copper Busbars from China - High-Purity Copper, Large Current Capacity - Top Suppliers & Factory
The Technical Specific for the Copper Busbar
| Parameter Category | Details Specification |
| Materials | T2 copper (standard), TU1 oxygen-free copper (customized) |
| Basic Specifications | Thickness: 3–30mm | Width: 10–280mm | Length: ≤12m | Maximum Cross-sectional Area: 6000mm² |
| Dimension Tolerance | Thickness: ±0.05mm | Width: ±0.1mm | Length: ±0.5mm |
| Electrical Conductivity | At 20℃, resistivity ≤ 0.017241 Ω·mm²/m; conductivity ≥ 98% IACS |
| Mechanical Properties | Hard state: Tensile strength ≥ 295 MPa, elongation ≥ 10% Soft state: Tensile strength ≥ 275 MPa, elongation ≥ 30% |
| Surface Treatment | Tin plating, Galvanizing (12.5–40μm), silver plating, passivation, powder coating, etc. Grid adhesion test qualified; salt spray test meets standards. |
| Insulation Treatment | Heat shrink tubing, plastic coating, powder coating; insulation strength ≥ 20 kV/mm |
Processing Capacity for the Copper Busbar
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✂Cutting Precision ±0.5mm. Supports custom lengths ranging from 50mm to 12m. No burrs.
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⌒Bending Angle error ≤ ±1°. Can process U-shaped, L-shaped, Z-shaped, etc. Minimum bending radius is 3× the thickness.
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⊙Drilling Hole diameter φ3–φ20. Hole position tolerance ±0.1mm. Suitable for bolt connections. Adjustable press line depth.
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◈Surface Treatment Uniform tin coating without leakage. Silver coating has excellent conductivity. Passivation for oxidation prevention. Powder coating for insulation and flame retardancy.
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♨Heat Treatment Annealing to eliminate internal stress, enhancing ductility and conductivity, meeting complex forming requirements.
The Application for Copper Busbar
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⚡Power System High and low voltage switch cabinets, bus ducts, transformers, distribution equipment — used for power transmission and current collection.
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🔋New Energy Charging stations, energy storage stations, photovoltaic inverters, new energy vehicle battery packs — capable of handling high current fast charging and energy storage transmission.
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🏭Industrial Manufacturing Electrolysis smelting, electroplating, chemical caustic soda production, etc. — ultra-high current scenarios, ensuring stable power supply.
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🏗Building & Lightning Protection Building grounding systems, lightning protection projects — quickly conducting lightning and leakage currents, ensuring safety.
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🚄Rail Transit Metro, high-speed rail power supply systems — suitable for frequent start-stop and high current transmission requirements.
Package & Shipping
Frequently Asked Questions
Q1 What copper grades are available for the copper busbar?
We offer T2 copper as the standard material and TU1 oxygen-free copper as a customized option. TU1 provides superior electrical conductivity and is ideal for applications requiring minimal resistivity and high purity.
Q2 What are the maximum dimensions available for copper busbars?
The copper busbar can be produced with a thickness of 3–30mm, width of 10–280mm, length up to 12m, and a maximum cross-sectional area of 6000mm². Custom sizes within these ranges are also available upon request.
Q3 What surface treatment options are available?
We provide a wide range of surface treatments including tin plating, galvanizing (12.5–40μm), silver plating, passivation, and powder coating. All treatments pass the grid adhesion test and meet salt spray test standards to ensure long-term durability.
Q4 What insulation options are offered for copper busbars?
Insulation options include heat shrink tubing, plastic coating, and powder coating. All insulated busbars achieve an insulation strength of ≥ 20 kV/mm, making them suitable for high-voltage environments and safety-critical applications.
Q5 Which industries are copper busbars most commonly used in?
Copper busbars are widely used in power systems (switch cabinets, transformers), new energy (EV charging, photovoltaic systems), industrial manufacturing (electrolysis, electroplating), building lightning protection, and rail transit (metro, high-speed rail).
Q6 What processing capabilities do you offer for custom copper busbars?
We offer comprehensive processing including precision cutting (±0.5mm), bending (U/L/Z-shaped, angle error ≤ ±1°), drilling (φ3–φ20mm, ±0.1mm tolerance), various surface treatments, and heat treatment (annealing) to meet complex forming and conductivity requirements.