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edits
Changes
→6.2 Contact Materials and Design of Contact Components
|Arcing contacts: brazed or welded parts Main contacts: silver plated, brazed or welded parts
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|Breaker points (automotive ignition)Vacuum contactors|Very Low chopping current, high arc erosion resistance, high switching frequencylow contact resistance|Low gas content W/Cu, W/CuSb, WC/Ag, CuCr|Tips or Contact discs welded to formed parts or Fe supports, shaped rings
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|Automotive horn contactsVacuum circuit breakers|High arc erosion switching capacity, low contact resistance at extremely high number of switching operations|W, Ag/SnO2Low gas content CuCr|Contact rivets, W weld buttons, springs or formed parts with brazed or welded tipsdiscs
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|Appliance switchesTransformer tab changers|Low contact resistance, reasonable High arc erosion and weld resistancein oil environment|AgNi0W/Cu in filtrated with approx.15, Ag/Ni, Ag/SnO2, (Ag/CdO)70%|Contact rivets, welded Brazed contact partstips
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|Temperature controllers (Thermostats)|Defined contacting point even at slow motion make, Disconnect switches in high operating temperatures|AgNi0.15, Ag/Ni, Ag/SnO2, (Ag/CdO)|Contact rivets, welded contact parts, weld buttons|-|Wiring devices (Light switches)voltage circuits|Low contact resistance, reasonable low mechanical wear, sufficient arc erosion and weld resistanceduring current commutation|Ag (electroplated), AgNi0.,15, AgCu, Ag/Ni, with make peaks also Ag/ZnO, (Ag/CdO)SnO2|Contact rivetsElectroplated coatings, welded contact brazed parts, Toplay profile segments
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'''Notes:'''