A lightning suppression attenuator including an enclosure having an interior volume and a coil of conductive wire received within the interior volume of the enclosure. The coil has a first lead extending outwardly through a first opening of the enclosure and a second lead extending outwardly of a second opening in the enclosure. A conductive grit fills a portion of the enclosure. The coil has a central void with turns of wire extending around the central void. The first lead is connected to a first discharge grounding system. The second lead is connected to a second discharge grounding system. The rigid foam material is affixed within the enclosure around the conductive grit and over the coil.