Used generally in undercurrent contact devices, auto switches, precision instrument and so on
It has good current conductivity and thermal conductivity, low but stable contact resistance, less but even electrolytic corrosion
When application under direct current condition, there is less plane shape material migration producing, when it is actuated, the contact resistance increases as a result of the oxide compound production, sensitive to the sulfur, poor anti-fusibility to weld ability under big electric current condition
