The present invention concerns a copper strip for the making of electrical contacts, with a base material of copper or a copper alloy and a coating of tin, wherein the coating of tin has a proportion of insoluble, precipitation-forming elements of 0.003 to 1.0, preferably up to 0.5, preferably up to 0.05, particularly preferably up to 0.01 percent by weight. The invention further relates to a process for producing a copper strip for the manufacture of electrical contacts and a connector.