A mounting bracket assembly includes a clamping arrangement mounted for vertical movement on a mounting structure and is movable between an engaged position and disengaged position relative to a self-contained breathing apparatus held in the mounting bracket assembly. A camming arrangement is located between the clamping arrangement and the mounting structure for permitting and preventing vertical movement of the clamping arrangement relative to the mounting structure. A powered latching mechanism is engageable with a portion of the clamping arrangement for providing unlatched and latched positions. A control arrangement separate from the powered latching mechanism is operatively connected thereto to selectively control the powered latching mechanism and effect release of the self-contained breathing apparatus from the latched position when the vehicle is in a stationary and parked condition.