A power distribution module includes a housing having a component chamber configured to house an electrical component therein. The housing includes at least a portion thereof defining a shield interface. A header assembly is coupled to the housing. The header assembly includes a header body including an inner body portion and an outer body portion, and the header assembly further includes a header shield positioned between the inner and outer body portions. The header shield engages the shield interface of the housing when the header assembly is coupled to the housing.