Tin Plated Copper Bar

Tin Plated Copper Bars are high-performance conductors engineered for applications demanding durability, conductivity, and corrosion resistance. Combining the superior electrical properties of 99.9% pure copper with a protective tin coating (typically 2–10 microns), these bars deliver consistent performance across a wide range of electrical and environmental conditions.

Whether you’re designing switchgear, electric vehicle battery modules, or solar energy systems, Tin Plated Copper Bars offer a cost-effective and long-lasting solution that resists corrosion, enhances solderability, and maintains low contact resistance over time.

Key Characteristics of Tin Plated Copper Bars

• Excellent Electrical Conductivity
  The base copper material maintains 85–90% IACS conductivity even after plating, ensuring reliable current flow in high-demand environments. Compared to alternatives, tinned copper bars offer nearly the same performance as bare copper with added corrosion protection.

• Superior Corrosion Resistance
  The tin layer prevents oxidation and galvanic corrosion, providing 500+ hours of resistance in salt spray tests (per ASTM B117), making it ideal for industrial, marine, and outdoor applications.

• Outstanding Solderability
  With wetting times of under 1 second using Sn63Pb37 solder at 250°C, these bars are highly suitable for soldered joints in automotive electronics, PCB grounding, and high-reliability connectors.

• Thermal Stability & Conductivity
  Operating effectively between -50°C and +150°C, tin plated copper busbars maintain a thermal conductivity of 380–400 W/(m·K), suitable for heat-sensitive systems such as telecom and control panels.

• Stable Mechanical Properties
  With tensile strength between 200–300 MPa, these bars provide mechanical robustness while remaining flexible enough for custom forming, punching, or machining.

• Low Contact Resistance
  Under typical installation pressure (100N), contact resistance stays between 0.1–0.5 mΩ·cm², helping reduce energy losses in high-current distribution networks.

Tin Plated Copper Bar – Custom Bus Bars Specification Sheet

Applications of Tin Coated Copper Bars

1. Power Distribution Systems
In switchboards, electrical panels, and low-voltage power cabinets, tin plated copper busbars reduce oxidation-related resistance and ensure reliable conductivity over long service periods.

2. Automotive and EV Components
Widely used for battery interconnects, high-voltage wiring, and chassis grounding in electric vehicles, these bars offer excellent vibration resistance and perform reliably at elevated temperatures.

3. Telecommunications and RF Equipment
Due to their stable conductivity, tinned copper bars are ideal for RF shielding, grounding racks, and base station cabinets, delivering >60 dB EMI shielding up to 6 GHz.

4. Renewable Energy Systems
Used in solar inverter cabinets, combiner boxes, and wind turbines, these bars maintain >95% initial conductivity even after decades of outdoor exposure.

5. Industrial Automation & Controls
Perfect for control panels, relay systems, and PLC cabinets, where the tin layer protects against sulfuric and humid industrial atmospheres.

Advantages Over Alternative Materials

Proper maintenance ensures the long-term performance of tin coated copper conductors:

• Storage Conditions:
  Store between 15–30°C, with 40–60% RH. Use VCI paper for long-term protection and avoid direct metal-to-metal stacking.

• Cleaning:

• Light Oxidation: 5% citric acid at 40°C

• Heavy Soiling: Non-chlorinated, pH 6–8 tin-safe cleaners

• Avoid: Ammonia-based cleaners and steel wool

• Operational Care:

• Apply NO-OX-ID A Special annually for high-current joints

• Retorque after 100 thermal cycles

• Use 4-wire Kelvin testing quarterly to monitor joint integrity

Why Choose Tin Plated Copper Bus Bar from Us?

• Custom sizes available (length, width, plating thickness)

• Surface options: Bright Tin / Matte Tin

• Plating methods: Electroplated or Hot-Dipped

• RoHS & REACH compliant

• Full support for OEM/ODM projects with fast delivery

Whether you're upgrading legacy systems or building cutting-edge energy infrastructure, our tin plated copper bars offer unmatched value in performance, reliability, and longevity.

Q1: What is a Tin Plated Copper Bus Bar used for?
A: Tin Plated Copper Bars are widely used in power distribution systems, electrical switchgear, grounding systems, and EV battery connectors due to their excellent conductivity and corrosion resistance.

Q2: Why is copper plated with tin?
A: Tin plating provides a protective layer to prevent oxidation and corrosion, ensuring long-term conductivity in harsh environments, especially in humid or high-temperature conditions.

Q3: Can I request custom sizes or holes in the bar?
A: Yes, we offer customization on dimensions, holes, slots, and bent shapes based on your drawings or specifications.

Q4: What is the difference between electroplated and hot-dip tin coating?
A: Electroplating produces a thinner, smoother, and more uniform layer, while hot-dip tinning creates a thicker, slightly rougher finish suitable for high-current or outdoor applications.

Q5: Do you provide RoHS and REACH certifications?
A: Yes, our tin plated copper bars comply with RoHS and REACH environmental standards and we can provide the corresponding certificates upon request.