(FDB) quiescent current-operated spring brake, in which a shaft to be braked (8) via one or more rotors (9) is held, by the or the rotors (9) by the force of springs (6) between an armature disc (7) and a flange plate (10) are clamped, in which an automatic ventilation of the spring brake is effected by supplying external energy (FDB) and for the event of failure of the external energy is provided a manually operable (HE) hand ventilating unit, characterized in that the (HE) hand ventilating unit in radially perpendicular to the axis of rotation is carried out (A) mountable or demountable form that the U-shaped fork (HE) from a hand ventilating unit (2) and a the fork embracing and to the fork via bolts (4) rotatably mounted hand ventilating handle (1) is made that the concentric to the axis of rotation (HE) to a (A) hand ventilating unit with the anchor plate (7) in communication via the flat face (5.3) of the coil support (5) also projecting ventilating socket (11) against the force of the springs (6) acts in taking from the plane surface and that the (HE) hand ventilating unit (5.3) of the coil support (5) is supported, see 1 .