A silver catalyst for ethylene oxidation to ethylene oxide is provided containing a promoter combination consisting of critical amounts of an alkali metal component and a sulfur component, the catalyst being essentially free of rhenium and transition metal components; optionally the catalyst contains a fluorine component. The assembly is provided with a centrally arranged, force-transmitting shaft. The products of the process may be used in the electrical and electronics industries, for example. Exemplary lead components include, but are not limited to, an electrode member, an elongated conductive connector pin of a proximal connector, a conductor extending from a proximal end of a distal tip of the lead, and a second elongated conductor cable residing within a second inner lumen of the lead body. The corresponding assembly can form part of the complete module.