The newly emerged packed U-cell (PUC5) inverter topology is investigated in this paper considering the design criteria, switching technique, voltage balancing of DC capacitor and switches voltages ratings. Afterwards, It is compared with other popular multilevel inverter topologies such as 3-level full-bridge (FB), 5-level cascaded H-bridge (CHB), neutral point clamped (NPC) and T3, in terms of components count, voltage balancing complexity, voltage rating, switching frequency, etc. in continue, the 3-phase configuration of the PUC5 inverter is presented and its proper application would be discussed. Some experimental results are shown to accredit the performance of the 3-phase PUC5 inverter in 3-wire and 4-wire systems to supply 1-phase and 3-phase AC loads.