A semiconductor package includes a first semiconductor die, an encapsulant body of electrically insulating mold compound that encapsulates the first semiconductor die, a plurality of power leads that protrude out of the encapsulant body and form power connections with the first semiconductor die, and a signal lead that protrudes out of the encapsulant body and forms a signal connection with the first semiconductor die, wherein the signal lead comprises a lead adapter retention feature that is configured to form an interlocked connection with a lead adapter that is fitted over an outer end of the signal lead.