Electrical power supply device (40, 71) designed to supply power to at least one light source of the light-emitting diode type and at least one electronic component, comprising: - a circuit (46, 74) for driving the electrical power supply of the or each light source, the drive circuit (46, 74) comprising at least one electrical conductor track and a housing (50, 78) for accommodating an insert; - an insert (48, 76) in an electrically conducting material, said insert being inserted in the accommodation housing (50, 78) and comprising a first end portion (53, 82) electrically connected to the conductor track, and a second end portion (54, 84) suited to being electrically connected to at least one electronic component, so as to supply electrical power to said electronic component, and wherein the drive circuit (46, 74) comprises a first face, a second face opposite the first face and an opening connecting the first and second faces and forming said accommodation housing, the electrical conductor track being arranged on the first face; the insert (48, 76) extending through the opening; the first end portion (53, 82) of the insert (48, 76) coming out towards the first face, and the second end portion (54, 84) coming out towards the second face; characterized in that the insert (48, 76) is composed of at least one branch (49A, 49B) having a T shape, the first end portion (53, 82) forms the shorter bar of the or each T-shaped branch and extends on the first face of the drive circuit and the first end portion (53, 82) is in copper, tin or aluminium; or indeed in an alloy comprising at least two materials among copper, tin and aluminium, the second end portion (54, 84) forms the free end of the longer bar of the or each T-shaped branch and the second end portion (54, 84) is in nickel, nickel-gold or nickel-palladium alloy. - a circuit (46, 74) for driving the electrical power supply of the or each light source, the drive circuit (46, 74) comprising at least one electrical conductor track and a housing (50, 78) for accommodating an insert; - an insert (48, 76) in an electrically conducting material, said insert being inserted in the accommodation housing (50, 78) and comprising a first end portion (53, 82) electrically connected to the conductor track, and a second end portion (54, 84) suited to being electrically connected to at least one electronic component, so as to supply electrical power to said electronic component, and wherein the drive circuit (46, 74) comprises a first face, a second face opposite the first face and an opening connecting the first and second faces and forming said accommodation housing, the electrical conductor track being arranged on the first face; the insert (48, 76) extending through the opening; the first end portion (53, 82) of the insert (48, 76) coming out towards the first face, and the second end portion (54, 84) coming out towards the second face; characterized in that the insert (48, 76) is composed of at least one branch (49A, 49B) having a T shape, the first end portion (53, 82) forms the shorter bar of the or each T-shaped branch and extends on the first face of the drive circuit and the first end portion (53, 82) is in copper, tin or aluminium; or indeed in an alloy comprising at least two materials among copper, tin and aluminium, the second end portion (54, 84) forms the free end of the longer bar of the or each T-shaped branch and the second end portion (54, 84) is in nickel, nickel-gold or nickel-palladium alloy.