Disclosed is an electromechanical actuator including a spring brake including a helical spring, a drum, an input member and an output member. The drum includes a friction surface configured to cooperate with at least one turn of the spring. The output member includes at least one lug. The lug includes a recess provided with at least a first bearing surface configured to cooperate with one of the first and second legs of the spring. The first bearing surface of the recess is inclined with respect to an axis of rotation of the brake at an angle of inclination of non-zero value.