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A CAD system for the analysis of power electronic circuits for EMC applications is being developed. The system is based on 3-dimensional finite-element electromagnetic field computations, with the source currents or voltages extracted either from measurements or from standard circuit analysis.The finite-element solver for this application is configured in terms of magnetic vector potential ( A J and modified electric scalar potential (VI), incorporating, unusually, the Coulomb gauge V.&=O.Comparisons of computed electromagnetic fields with measurements of fields emitted from a 600V, 300A IGBT switching circuit are reported. Agreement in magnetic field strength is fair (within SdBpAlm) at the low frequencies (lOkHz-2OkHz) considered for this paper.