Fog Tin-plated Copper Caps
Products Description
Fog tin-plated copper caps are electrical connection protection components made from high-purity oxygen-free copper as the base material, through precision stamping, shaping, and tin-plating processes. They are widely used in new energy storage systems, power distribution units, low-voltage electrical switches, automotive electronic control systems, and industrial electrical equipment.
Their core functions are to provide oxidation protection, enhanced conductivity, and long-term stable mechanical connections for copper terminals. Compared to traditional bright tin or bare copper structures, the tin-plated layer not only has a uniform and smooth appearance but also exhibits superior resistance to oxidation, corrosion, and arc impact, making it suitable for various complex electrical environments.
Material & Key Characteristics
1. Substrate: High-Conductivity Oxygen-Free Copper (T2 / C1100)
Uses internationally standard oxygen-free copper material with a purity of≥99.9%, exhibiting excellent conductivity and ductility, ensuring minimal breakage, deformation, and low contact resistance during cold pressing or welding.
2. Surface Layer: Matte Tin Plating
The matte tin plating is formed by electrochemical deposition, resulting in fine, uniform grains and stable thickness. Unlike bright tin, matte tin has low surface reflectivity and moderate friction, which improves mechanical adhesion and reduces the risk of plating peeling.
3. Environmental Characteristics
Complies with RoHS and REACH environmental standards. The plating is lead-free and cadmium-free, meeting the sustainable manufacturing requirements of the new energy and electric vehicle industries.
Product Advantages
Matte Tin Plating: Enhanced Protective Performance
Compared to traditional bright tin plating, the matte tin plating offers superior oxidation resistance, reducing the likelihood of "tin whiskers" or "bright surface corrosion," and maintaining stable contact even in high humidity and high temperature environments.
This eliminates the need for frequent maintenance or replacement during long-term service, significantly reducing equipment maintenance costs.
01
Balanced Conductivity and Heat Dissipation
The copper substrate possesses excellent thermal and electrical conductivity, effectively reducing energy loss and contact heat generation under high current surges or continuous current-carrying conditions, ensuring the safe operation of electrical systems.
02
Precision Forming Process
Through high-precision stamping and fully automated shaping processes, the dimensional tolerance of each copper cap is strictly controlled within ±0.02mm, ensuring a tight, secure, and misaligned fit.
The product edges are chamfered to prevent damage to wires or connectors during installation.
03
Matte Finish, Aesthetically Pleasing, and Durable
The matte surface not only offers a soft and high-end visual appeal but also provides better adhesion and solderability, making subsequent assembly smoother.
In new energy and industrial electrical control equipment, matte tin parts with a consistent appearance effectively enhance the professionalism and quality of the overall structure.
04
Environmentally Friendly Electroplating Process
Utilizing a closed-loop electroplating system, the plating solution composition is precisely controlled, and wastewater is automatically recycled and treated, ensuring both product plating quality and compliance with global green manufacturing requirements.
05
Technology and Manufacturing Capability
Advanced Production Lines
The company is equipped with fully automated tin plating production lines, imported precision stamping machines, constant-temperature annealing furnaces, and online testing systems, achieving full automation from raw material processing to plating completion.
Strict Quality System
Certified by ISO 9001 and IATF 16949, ensuring traceability and consistency control at every stage.
Production data is recorded in real time, and batch quality files are generated, providing complete test reports.
Professional Engineering Team
The company has a dedicated surface treatment laboratory that conducts tin layer structure analysis, electrochemical testing, and durability verification for different application scenarios, providing customers with professional, customized solutions.
Stable Supply and Delivery Capabilities
With an annual production capacity of tens of millions of copper caps, the company can flexibly handle large-volume and multi-specification orders.
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