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Contact Materials

Silver Nickel
Silver nickel contact materials are typically used in low and medium power applications.

Switches, mini-relays, and low power contactors are common applications for silver nickel. There is some use of silver nickel in AC circuit breakers as well. Contact resistances are relatively low and remain stable over time when compared to other silver/copper alloys. As the nickel content increases, the material’s resistance to arc erosion improves, although contact resistance will increase as well. One disadvantage of silver nickel is its diminishing arc erosion properties over 100 amps.