Abstract: An electrical connector device for use in providing selectively switchable electrical connections between respective terminals of two circuit elements, comprising a unitary housing of electrically insulating material carrying a plurality of first socket terminals open to one face of the housing for receipt of terminals of a first circuit element, and carrying a plurality of second terminals projecting from a second face of the housing opposite to said one face, for connection to the second circuit element, and a plurality of individually operable switching elements each having an associated conductive portion which projects beyond said one face of the housing and each being selectively operable between a conductive state providing an electrical connection between said conductive portion and respective first and second terminals, a first non-conductive state in which said conductive portion is connected only to the associated first socket terminal, and a second non-conductive state in which said conductive por