What type branch breakers does a Mini Power-Zone (MPZ) indoor/outdoor packaged power supply with a ``B`` after ``MPZ`` use? An example of which is an MPZB7S40F.

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Issue:
Selection of branch breakers for MPZ and MPZB

Product Line:
LV Transformers

Environment:
Applies to Mini Power- Zone (MPZ) Transformers by SquareD/Schneider Electric

Cause:
Branch breakers for MPZ and MPZB products are customer supplied

Resolution:
The MPZ with a bolt-on interior, also referred to as a ``MPZB``, can accommodate Type QOB bolt-on breakers and can also still accommodate Type QO plug-on breakers. Thus, you can use both QO and QOB breakers in the MPZB!