AgMo50 soft annealed (+A)

Silver-molybdenum contact materials are relatively rare in Europe, more commonly used in the United States. With 20 to 80% Mo they have the highest erosion resistance at medium to high switching capacities. Silver-molybdenum composites with Mo contents of 40 to 80% generally have lower contact resistance than silver-tungsten composites of comparable composition. This is mainly due to the volatility of Mo oxide, which even at relatively low temperatures under the influence of the arc causes a self-cleaning of the contact surfaces. Silver-molybdenum contact materials, such as silver-tungsten, are used in low-voltage circuit breakers.