Abstract: A transient voltage surge suppressor (TVSS) having a fuse rated to withstand high transient surge currents is disclosed. The TVSS employs metal oxide varistors (MOV's) in close proximity to the fuse such that heat from failed MOV's is used to reduce the time required to blow the fuse. The fuse may be mounted to the metal bus connection of a MOV within a sand-filled or potted box containing the MOV's. Thus, the TVSS of the present invention utilizes a thermally assisted disconnect method which enhances the performance of the TVSS under unusual fault conditions.