This paper describes the use of the Auxiliary Reso-nant Commutated Pole (ARCP) converter topology for the cellsof a Modular Multilevel Converter. The workings of the ARCPtopology are explained as well as the calculation method usedto compare the efficiency to a conventional solution. Comparisonis done for an HVDC as well as for a STATCOM application.In both cases, use of the ARCP topology can lead to significantreductions in switching losses. The implications of these findingsare dealt with as well. These include a higher possible switchingfrequency and a higher practically feasible cell voltage.