An electrical apparatus such as an electrical contactor or a terminal block, comprises a casing made of an electrically insulating material, a conductive bar mounted in the casing and at least one push-in type connection terminal. The terminal comprises a contact spring having an elastic portion undergoing an elastic deformation under the action of an external force applied on the contact spring either by an electrical conductor during its insertion at a first aperture of the casing so as to place the electrical conductor in a contact position located between the contact spring and the conductive bar in order to establish an electrical connection between the electrical conductor and the conductive bar, or by a tool inserted into a second aperture of the casing so as to open the contact spring and release the electrical conductor in order to remove it out of its contact position. The electrical apparatus comprises a support clip independent of the casing and of the conductive bar. The clip comprises fastening elements allowing mounting of the support clip on the contact spring and delimits a bearing face against which the contact spring bears during the deformation of its elastic portion under the action of the external force in order to impose the manner in which the elastic portion spatially deforms and against which the contact spring abuts in its maximum deformation state in order to limit the elastic deformation of the elastic portion of the contact spring below a predetermined value regardless of the intensity of the external force.