A printed circuit board (1) for converting an input phase to at least one output phase (U,V,W), which has an input phase surface area with at least one conductive DC+ layer (28) and one conductive DC− layer (29) for each conductive DC+ layer (28), for conducting the input phase. There is at least one high-side power semiconductor (6) for each output phase (U, V, W) and one low-side power semiconductor (7) for each high-side power semiconductor (6), for switching the input phase. The at least one DC+ layer (28) corresponding to a respective DC− layer (29) is formed in a cover surface area (2), which covers at least 75% of the input phase surface area.