Spring connection terminal for an electrical apparatus, said terminal comprising: - a case in electrically insulated material having a conductor aperture provided to permit the insertion of an electric conductor in said terminal; - a locking spring housed in said case, the locking spring being a leaf spring provided to block the electric conductor inserted in the conductor aperture so as to establish an electric connection between the electric conductor and said terminal; - an actuation lever adapted to cooperate with the locking spring to permit the insertion of the electric conductor in said terminal, said lever being adapted to assume an operating position in which said lever can rotate around a rotation axis between a first angular position and second angular position different from each other, said terminal comprising at least one inhibition element provided to prevent a rotation of said lever in a first direction, said terminal being characterized in that: - said lever is adapted to assume a rest position in which the rotation of the actuation lever in said first direction is prevented by said at least one inhibition element; - said lever is selectively movable in a sliding manner between said operating position and said rest position; - comprises at least one locking element adapted to cooperate with said lever to selectively and releasably block the sliding of said actuation lever between the operating position and the rest position, wherein said locking element comprises a locking tooth operatively interposed between the operating position and the rest position, and wherein the lever comprises a rotation shaft to enable the actuation lever to rotate around said rotation axis, the rotation shaft being such as to act in contrast with the locking tooth when the actuation lever slides between the operating position and the rest position so as to make it possible to make the actuation lever snap into said operating and rest positions in which the sliding of said lever is blocked. - a case in electrically insulated material having a conductor aperture provided to permit the insertion of an electric conductor in said terminal; - a locking spring housed in said case, the locking spring being a leaf spring provided to block the electric conductor inserted in the conductor aperture so as to establish an electric connection between the electric conductor and said terminal; - an actuation lever adapted to cooperate with the locking spring to permit the insertion of the electric conductor in said terminal, said lever being adapted to assume an operating position in which said lever can rotate around a rotation axis between a first angular position and second angular position different from each other, - said lever is adapted to assume a rest position in which the rotation of the actuation lever in said first direction is prevented by said at least one inhibition element; - said lever is selectively movable in a sliding manner between said operating position and said rest position; - comprises at least one locking element adapted to cooperate with said lever to selectively and releasably block the sliding of said actuation lever between the operating position and the rest position, wherein said locking element comprises a locking tooth operatively interposed between the operating position and the rest position, and wherein the lever comprises a rotation shaft to enable the actuation lever to rotate around said rotation axis, the rotation shaft being such as to act in contrast with the locking tooth when the actuation lever slides between the operating position and the rest position so as to make it possible to make the actuation lever snap into said operating and rest positions in which the sliding of said lever is blocked.