Electric contact and breaker using the same

Details Electric contact and breaker using the same Electric contact and breaker using the same

2005-12-13

2005-12-13

Friedhofer, Michael (Department: 2832)

Electricity: circuit makers and breakers

Electric switch details

Contact

C200S266000

Reexamination Certificate

active

06974923

ABSTRACT:
A high quality electrical contact that is made of a Cd free Ag alloy and can be applied to a breaker is provided.The electrical contact is made of an Ag alloy containing Sn and In each 1 to 9% by weight, and has a first layer as the surface layer and a second layer as an internal portion. The hardness of the first layer and the hardness of the second layer are equal to or more than 190 and equal to or less than 130, respectively, based on micro Vickers standard defined by JIS. The thickness of the first layer is within the range from 10 to 360 μm. In particular, the electrical contact has a high quality temperature characteristic as well as a high quality welding resistance characteristic.

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