A power converter comprising at least one electric circuit module, a heat release element having an electric circuit device insertion section and a surface cooled by a cooling medium, and a capacitor device, wherein each of the electric circuit modules comprises a plate-shaped first-polarity conductor having a first heat release section with a first heat release plane, a plate-shaped second-polarity conductor having a second heat release section with a second heat release plane, and a plate-shaped intermediate conductor having a third heat release section with a third heat release plane, and when the electric circuit device is inserted into the electric circuit device insertion section, the heat release planes being thermally connected to the cooled surface of the heat release element via an electrically insulating structure, said electric circuit module comprises semiconductor chips (111, 112) arranged between the first heat release section and the third heat release section and between the second heat release section and the third heat release section, respectively, each of said plate-shaped first and second polarity conductors (130, 140) has a respective plate-shaped conductor terminal (133, 143) provided with a screw hole (135, 146) and arranged such that surfaces of said conductor terminals (133, 143) are parallel to each other and oppose each other, said capacitor device has first and second polarity plate-shaped capacitor terminals (181, 182) each provided with a screw hole (187, 188) and arranged such that surfaces of said capacitor terminals (181, 182) are parallel to each other and oppose each other, an electrically insulating connection member comprises at both sides in the lateral direction thereof a nut-containing portion arranged in an offset condition and each containing at least a nut, wherein when the inverter is mounted, respectively one of the conductor terminals (133, 143) is electrically connected to respectively one of the capacitor terminals (181, 182), and the screw holes (135, 187) in one of the conductor terminals (133, 143) and in the first polarity plate-shaped capacitor terminal match the nut-containing portion associated therewith such that a screw can be inserted and threadably engaged with the nut contained in the associated nut-containing portion, and the screw holes (146, 188) in the other of the conductor terminals (133, 143) and in the second polarity plate-shaped capacitor terminal match the nut-containing portion associated therewith such that a screw can be inserted and threadably engaged with the nut contained in the associated nut-containing portion. a plate-shaped first-polarity conductor having a first heat release section with a first heat release plane, a plate-shaped second-polarity conductor having a second heat release section with a second heat release plane, and a plate-shaped intermediate conductor having a third heat release section with a third heat release plane, and when the electric circuit device is inserted into the electric circuit device insertion section, the heat release planes being thermally connected to the cooled surface of the heat release element via an electrically insulating structure,