Changes

===6.4.4 Switching Contacts===

<xr id="fig:fig6.7"/> Fig. 6.7: Contact opening with arc formation schematic

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<xr id="fig:fig6.9"/> Fig. 6.9: Histogram of the contact resistance Rk of an electroplated palladium layer (3 μm) with and without hard gold flash plating (0.2 μm) after exposure with different plastic materials

<xr id="fig:fig6.11"/> Fig. 6.11: Distribution of cumulative frequency H of the contact resistance for solid contact rivets after 10 days exposure in a three-component test environment with 400 ppb each of H₂S, SO₂ and NO₂ at 25°C, 75% RH; Contact force 10cN; Measuring parameters: ≤ 40 mV_DC,10 mA; Probing

<xr id="fig:fig6.12"/> Fig. 6.12: Material transfer under DC load a) Cathode; b) Anode. <br /> Material: AgNi0.15; Switching parameters: 12V_DC, 3 A, 2x10⁶ operations

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<xr id="fig:fig6.13"/> Fig. 6.13: Arc erosion of a Ag/SnO₂ contact pair after extreme arcing conditions a) Overall view; b) Partial detail view

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<xr id="fig:fig6.14"/> Fig. 6.14: Micro structure of a welded contact pair (Ag/SnO₂88/12 - Ag/CdO88/12) after extremely high current load. a) Ag/SnO₂88/12; b) Ag/CdO88/12

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==References==

[[Application Tables and Guideline Data for Use of Electrical Contact Design#References|References]]