Changes

Contact profiles in larger sizes are often used for switching devices in the low voltage technology. For these the contact layer mostly consists of arc erosion resistant materials such as silver–nickel, silver–metal oxides or the weld resistant silver– graphite. The brazable or weldable underside of the metal oxide or silver–graphite materials is usually pure silver with also quite often a thin layer of a phosphorous containing brazing alloy applied to aid the welding process.

<figure id="fig:Typical configurations of multi-layer contact profiles">

[[File:Typical configurations of multi-layer contact profiles.jpg|right|thumb|Typical configurations of multi-layer contact profiles]]

*Quality criteria <br />Beause of the variety of configurations of contact profiles usually the quality issues are separately agreed upon between the manufacturer and the user.<br />

<figure id="fig:Contact Profiles Dimensions and tolerances">

[[File:Contact Profiles Dimensions and tolerances.jpg|right|thumb|Contact Profiles Dimensions and tolerances]]

</figure>

The thickness of the Au top-layer, which is sputtered for example, is between 0.2 and 5 μm, depending on the requirements. Tolerance of thickness is about &plusmn; 10%.

==References==

[[:Manufacturing Technologies for Contact Parts#References|References]]