AgNi40

The AgNi40 silver-nickel material, also known as Ag60Ni40, is resistant to welding at inrush currents up to 100 A, has good resistance to burn-off at switching currents of up to 100 A. It shows uniform burnup on both contact pieces (burnup residues are non-conductive) and has high hardness and thus correspondingly low mechanical wear. AgNi40 has good ductility, good arc migration properties and good arc quenching properties. The disadvantages are unfavorable burn-off properties at switching currents above 100 A, tendency to weld at inrush currents above 150 A and high contact resistance. The AgNi40 is used in low-voltage AC and DC switching devices, for auxiliary current switches for DC and AC as well as switches for domestic appliances with nominal currents up to approx. 10 A, service switching devices for DC and AC as well as motor switches or contactors for AC up to approx for direct current, for automotive switches and relays, for circuit breakers (direct and alternating current) as well as for travel switches for railways, in particular direct current circuit breakers.