Tin Plated Copper Terminal Blocks: Anti Oxidation Protection, Ensuring Long-lasting And Stable Conductivity

In electrical connection systems, terminal blocks are the "bridge" for current transmission, and their conductivity and corrosion resistance directly affect the stability and safety of circuit operation. Tin plated copper terminal blocks, with the dual advantages of "excellent conductivity of copper+strong oxidation resistance of tin", effectively solve the pain points of traditional copper terminal blocks that are prone to oxidation and conductivity degradation, becoming the preferred component in the field of electrical connections.

The core competitiveness of tin plated copper terminal blocks comes from scientific material combination and precision technology. The substrate is made of high-purity electrolytic copper (with a copper content of ≥ 99.95%), which has excellent conductivity (up to 58MS/m at 20 ℃) and provides a low impedance channel for current transmission; The surface is coated with a uniform tin layer using hot-dip or electroplating processes, with a thickness strictly controlled between 8-15 μ m. This layer can tightly adhere to the surface of the copper substrate and form a dense "protective barrier". Tin has stable chemical properties and is not easily reactive with oxygen and moisture in air. It can effectively isolate copper substrates from corrosive media (such as moisture and sulfides). Salt spray testing has verified that tin plated copper terminal blocks can maintain no significant oxidation or corrosion for more than 500 hours in a 5% sodium chloride salt spray environment, which is much better than bare copper terminal blocks (usually less than 100 hours).

In practical use, tin plating can also prevent the formation of oxide films on the surface of copper terminal blocks (copper oxide has a higher resistance), ensuring that the conductivity does not deteriorate after long-term use. Even in harsh environments with alternating high and low temperatures (-40 ℃ to 120 ℃), the tin layer can still maintain structural stability, without cracking or detachment, ensuring a tight connection between terminal blocks, wires, and equipment interfaces. Whether it is household distribution boxes, industrial control cabinets, automotive wiring harnesses, or new energy equipment, tin plated copper terminal blocks can provide excellent oxidation resistance and long-lasting conductivity to ensure the safety and stability of circuit connections, reducing circuit failures and maintenance costs caused by terminal block oxidation.