The Trickery Of Copper Terminal Blocks: Using "copper-plated Aluminum" To Impersonate "pure Copper Busbars"

Some products on the market appear identical to pure copper terminal block, but their internal structure uses aluminum-based materials with only a copper plating on the surface. While this type of aluminum-coated copper structure may seem to achieve the color and feel of copper, it lacks the conductivity and durability of pure copper. Therefore, its performance may differ from expectations under actual wiring and current-carrying conditions. Such aluminum-core products may experience thermal expansion or poor contact under high-load environments.

Unlike copper distribution block, which is made entirely of copper, aluminum-based materials have different resistivity, thermal expansion properties and mechanical strength. These differences will gradually become apparent in harsh electrical environments, especially under high temperature or long-term current-carrying conditions. The material properties of pure copper terminal strip enable stable power transmission in electrical cabinets and distribution frames, while composite plating structures may experience localized performance degradation over long-term use.