Traditional silver is also one of the softest interconnect finishes. For most automotive interconnect applications, wear is not a major concern as insertion forces and cycles remain low. This, however, is not the case for electric vehicle charger applications. While home charging systems may see hundreds of insertions annually, the proposed high-speed public charging infrastructure for mass deployment will require thousands more. As traditional silver in EV applications wears through, charging efficiency will be reduced. This is a result of the increase in resistivity that results from the wearing of the silver layer material down to the nickel barrier layer. Furthermore, the system stops working altogether as the base copper alloy is exposed to corrosive media. LUNA® has a similar hardness to hard gold — which is a well known interconnect finish and more than 2.5 times harder than standard silver. The figures below demonstrate how wear differentiates across a variety of conditions.