The PAC-MKA53BC is a five ports branch box for use in multi-zone mini split applications with Mitsubishi's MXZ-SM36, MXZ-SM42, MXZ-SM48, and MXZ-SM60 outdoor condensers. It manages and distributes the flow of both refrigerant and power from the outdoor unit to all connected indoor units. With electronic LEVs, Mitsubishi's branch boxes ensure optimal refrigerant flow and an accurate indoor unit temperature for your mini split indoor units.