A power electronic assembly with a housing and a capacitor device therein. The capacitor device has capacitor elements, each with a first and a second capacitor contact device, and a capacitor busbar having a first metal shaped body with a first contact point and a second metal shaped body with a second contact point. The first metal shaped body of first polarity has a plurality of first terminal contact devices each connected to a first capacitor contact device and the second metal shaped body of second polarity has a plurality of second terminal contact devices each connected to a second capacitor contact device. The individual current paths each formed from a first partial current path between the first contact point and a first terminal contact device and a second partial current path between the second terminal contact device associated with the first and the second contact point each have the same current path length.