A heat conductor for use with an inverter in an electric or hybrid-electric vehicle, the inverter including a direct current link capacitor having multiple film capacitors configured in a stack to form a substantially polygonal prism. Each film capacitor has orthotropic characteristics. The heat conductor has a first substantially planar member configured to contact a first side of the polygonal prism formed by one of the film capacitors, and a second substantially planar member configured to contact a second side of the polygonal prism opposite the first side of the rectangular prism, the second side of the rectangular prism formed by another one of the film capacitors. The first and second planar member are thermally conductive for dissipating heat generated by the film capacitors, are attached by an interconnect, and have sufficient rigidity to confine expansion of the film capacitors across the thicknesses thereof.