The role of USB connector terminal plating

Terminal material selection affects: Conductivity - minimizes material resistance; ductility - aids in terminal molding; buckling strength - allows for large displacements within the elastic range; and stress relaxation - maintains the ability of the terminal to resist loads when subjected to prolonged stresses or used at high temperatures; Hardness - reduces wear and tear of the terminal metal. Pure copper terminals have good electrical conductivity, but their mechanical strength and heat resistance are not good. When pure copper is alloyed with an element, the difference in atomic size results in a blockage or attenuation of the electron transport process. Too copper is a high-strength material but its conductivity deviation. Phosphor bronze, also called phosphor bronze, has good elasticity and strong bremsstrahlung. Beryllium copper has high strength, high elasticity, high toughness characteristics, but the conductivity is deviation. The role of terminal plating: beautiful; protection, to extend the life of the product, in the product surface cladding corrosion-resistant materials. Special surface properties, improve product conductivity, improve product weldability, improve light reflection, reduce contact impedance; mechanical or engineering properties, improve product strength, improve product lubrication, increase hardness and wear resistance, improve product heat resistance, weather resistance, radiation resistance, prevent carburization, nitriding.

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