A battery disconnect unit (BDU) is arranged to selectively enable current flow between a power source and a battery pack of a vehicle, and between the battery pack and the vehicle. The battery disconnect unit includes a housing having an exterior and an interior, a first exterior surface and a first interior surface, and an opening opposite the first interior surface. A plurality of BDU components are mounted within the interior of the housing. The BDU components are mounted at least one of on and adjacent to the first interior surface of the housing, and respective fasteners used to mount the BDU components to the first interior surface of the housing are not exposed on the first exterior surface of the housing. When the housing is mounted on a mounting surface associated with the battery pack, the opening is arranged adjacent to the mounting surface and the first interior surface is arranged opposite the mounting surface relative to the opening.