Custom Tin plated copper bus bar

√  Copper cores ensure efficient power distribution.

√  Enhances electrical performance.

√  Resists wear and mechanical damage.

√  Ideal for electrical distribution, switchgear, and more.

√  Meets industry quality and reliability standards.

Leading Tin-plated copper bus bar Manufacturer

Our factory specialize in manufacturing high-quality tin-plated copper bus bars. Our products feature enhanced corrosion resistance, excellent electrical conductivity, and improved solderability. With customizable dimensions and compliance with ISO and industry standards, we ensures reliable and durable bus bars for a wide range of electrical and industrial applications. Trust us for superior performance and exceptional quality in every bus bar we produce.

Parameters

1. Electrical performanc

• Rated current: 250A to 5000A (adjusted according to cross-section and wire diameter).
• Conductivity: Tinned copper purity ≥ 99.95%, resistivity ≤ 0.01777 Ω-mm²/m (hard state).
• Voltage withstand level: frequency withstand voltage 42kV (dry test), impact withstand voltage 75 kV.

2. Physical Characteristics

• Single wire diameter: 0.05mm to 0.30mm (braided); cross-section range 1.5-6000mm².
• Thickness of tin plating: usually 0.5-2.0 μm (conventional plating), special requirements up to 6 μm or more.
• Mechanical strength: hard state busbar tensile strength ≥200N/mm², soft state elongation ≥35%.

3. Environmental adaptability

• Temperature range: -30℃ to 105℃, some high-temperature-resistant models can reach 200℃.
• Protection grade: IP54 (dustproof and waterproof).

How to tin plated copper bus bar?

1. Copper pretreatment

• Drawing and annealing: High purity copper rods are drawn to the target wire diameter, and the annealing temperature is controlled at 400-550°C to optimize the ductility.
• Acid washing to remove oxidized layer: Use acidic solution (such as hydrochloric acid or flux) to remove surface oxides to ensure plating adhesion.

2. Tin plating process

• Hot-dip plating/electroplating: Copper wires are immersed in a tin furnace (250-260°C) or electroplating bath to form a uniform plating layer. Cooling and cleaning: Water or air cooling is used to remove the surface oxides.
• Cooling and Cleaning: After water or air cooling, clean the residue, add shaft guide oil to prevent the generation of tin ash.

3. Post-treatment and inspection

• Annealing: 600-800℃ annealing to eliminate stress and improve flexibility.
• Quality inspection: including conductivity test, plating thickness measurement (such as X-ray fluorescence method) and corrosion resistance test.

How thick is the tin plated copper busbar?

• Conventional applications: 0.5-2.0μm, balancing cost and performance.
• High protection requirements: such as power equipment or marine environment, the thickness of the coating can be more than 6μm.

Why tin plating on copper bus bars?

Tin plating on copper bus bars serves multiple purposes. Firstly, it enhances the corrosion resistance of the copper, prolonging its lifespan and ensuring long-term performance, especially in humid or corrosive environments. Secondly, tin plating provides a smoother surface finish, reducing surface irregularities and improving electrical contact and conductivity. Additionally, tin plating can prevent oxidation of the copper surface, maintaining its integrity and electrical properties over time. Overall, tin plating offers improved durability, conductivity, and reliability for copper bus bars in various applications.

Tin-plated copper bus bars offer several advantages:

1. Anti-oxidation and corrosion resistance

• The tin layer isolates copper from oxygen and moisture, avoiding the generation of copper green (Cu₂(OH)₂CO₃) with poor electrical conductivity, and prolonging the life of the busbar.

2. Improve conductive stability

• Tin plating reduces contact resistance (by about 10-15%), especially in high-frequency or high-current scenarios to reduce energy loss.

3. Enhanced solderability

• Tin has a low melting point (232°C), which makes solder joints easier to form and stronger, making it suitable for automated soldering processes.

4. Adapt to complex environments

• Resistant to salt spray, acid and alkali, suitable for chemical, marine and other corrosive environments.

5. Economy and environmental protection

• Compared with pure silver plating, tin plating cost is lower, and tin non-toxic in line with RoHS standards.

Tin-plated copper bus bars application:

• Power system: transformer, switchgear connection, extra high voltage transmission.
• New energy vehicles: battery pack connection, charging pile internal conductor.
• Communication equipment: 5G base station, data center high frequency signal shielding.