A power module is provided that is configured to supply power to a load. The power module includes a current generator configured to generate a current; a current rail configured to receive the current and output the current from the power module, wherein the current rail includes a first opening formed therethrough, and the current, while flowing along the current rail in an output direction, flows around the first opening; and a housing that houses the current generator, wherein the housing includes an outer frame from which the current rail outwardly extends, wherein the outer frame includes a recess aligned with the first opening of the current rail such that the recess and the first opening form a unitary opening.