Tin-plated copper-alloy terminal material

摘要

By forming a nickel-based coating layer or a cobalt-based coating layer having a coating thickness of 0.005 µm or larger and 0.05 µm or smaller on an outermost surface of a tin-based surface layer of a terminal material of low-insertion fore in which an asperity shape of an interface between a copper-tin alloy layer and a tin-based surface layer is controlled, it is possible to reduce insertion force of fitting even though all-purpose tin-plated terminal material is used by combination.