Tin copper wire

tin copper wire
tin copper wire

Tin copper wire description

  • Hs code:740819
  • Wire Diameter(mm): 0.12-0.25-0.4-0.5-0.6-0.7-0.8-1.0-1.2-1.3-1.5-1.6-1.8-2.0mm
  • Copper alloy mode： T2
  • Tin content : 2.5~4 μm
  • Repeated bending: more than 4 times
  • Feature: copper wire surface tin coated,good conductivity, soft, weldable

More information

Tinned copper wire is a high-performance conductive material fabricated with high-purity copper core, coated with even tin layer through electroplating or hot-dip tinning. Produced in accordance with ASTM B33 and SJ2422-83 Standards for Tinned Copper Wires for Electronic Components, it features a compact, smooth tin coating of 2–5 μm. This material perfectly integrates the outstanding electrical conductivity of copper and superior protective properties of tin. Widely adopted in electronics, electrical engineering, automotive and new energy sectors, it acts as a core material to deliver reliable circuit connection solutions.
The product boasts remarkable oxidation and corrosion resistance. The continuous tin barrier effectively separates the copper core from air, moisture and industrial corrosive media to avoid copper oxidation and tarnishing. It maintains stable performance under humid, marine and severe industrial conditions, achieving a much longer service life than bare copper wire. Besides, its excellent solderability enables rapid, solid and consistent welding. Thanks to the low-melting-point tin coating, soldering operation becomes simple while solder joints remain stable, avoiding welding defects induced by oxidation after long-term storage.
Our tinned copper wire adopts T1/T2 high-purity copper (99.99% copper) as the conductor, preserving superb conductivity of pure copper to realize low-resistance, stable power and signal transmission for precision electronic equipment. Stranded tinned copper wire exhibits excellent flexibility and mechanical strength, capable of withstanding repeated bending, vibration and temperature fluctuation without fracture. It fits complicated installation and dynamic operating conditions, ensuring long-term stable operation of wiring harnesses and equipment circuits.
We supply a complete series of standard and customizable specifications to satisfy various industrial requirements. The diameter of single wire ranges from 0.05 mm to 0.15 mm with standard tin coating thickness of 2–5 μm. With high-purity T1/T2 copper core, our wire offers stable conductivity, uniform coating thickness and high dimensional precision. Both solid single-core and multi-strand constructions are available. The products are fully compatible with automatic cutting, stripping and welding assembly lines, assisting customers in improving processing efficiency and lowering production costs.
Our hot-dip tin-alloy coated tinned copper wire delivers bright surface, consistent color, strong adhesion of tin layer and superior anti-oxidation performance, fully complying with SJ2422-83 standard for tinned copper wires used in electronic components.
tin copper wire
Tin copper wire
Tinned copper wire
Tin copper wire
tin copper wire
Tin copper wire

Product Applications

Tinned copper wire is a versatile conductor widely adopted in high-reliability connection applications. It is extensively used for internal wiring of precision electronic devices, automotive low-voltage wiring harnesses, outdoor photovoltaic connection cables, industrial control and automation equipment, flexible battery connectors, transformers, various wires and cables, jumpers and other electronic components, including resistors, capacitors, photosensitive elements, diodes, crystal sensors, PCB connectors and household appliances. Maintaining stable performance under demanding operating conditions such as high temperatures, persistent vibration, outdoor exposure and humid surroundings, it acts as an essential base material for the electronics and electrical supporting industries.
Advantages & Disadvantages

Advantages: Firstly, it has excellent anti-oxidation and anti-corrosion capability. The complete tin protective layer isolates the copper core from oxygen, moisture and corrosive media, avoiding copper rust and greatly prolonging service life. Secondly, it offers superior solderability, enabling fast and firm welding without pre-oxidation treatment, which improves assembly efficiency. Thirdly, it retains the high conductivity of pure copper to ensure stable power and signal transmission. In addition, the stranded type features outstanding flexibility and bending resistance, suitable for repeated bending and dynamic installation scenarios with strong environmental adaptability.

Disadvantages: Compared with bare copper wire, tinned copper wire has slightly higher cost due to the additional tin plating process. Its conductivity is slightly lower than pure silver-plated copper wire, making it less suitable for ultra-high frequency and ultra-precision signal transmission scenarios. Moreover, excessively thick tin coating may slightly increase wire outer diameter and affect crimping accuracy in ultra-fine wiring applications.

Widely applied in precision electronic internal wiring, automotive low-voltage harnesses, photovoltaic outdoor cables, industrial control equipment, battery flexible connections and transformers, our tinned copper wire adapts to high-temperature, vibrating and outdoor exposure working conditions. Compared with ordinary bare copper wire, it solves common drawbacks including easy oxidation, poor corrosion resistance and unstable soldering. Balancing conductivity, durability, solderability and environmental adaptability, it is the ideal choice for high-reliability electrical connection projects worldwide.

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