Embodied TCO protected MOVs are a now technology which combine TCO and MOVs in one container , the thermal fusible element is inside the epoxy coating, it is in intimate contact with the ceramic disk. And, because the thermal element is at the center of the disk, it is close to the heat source, This method of construction allows the new device to perform standard MOV functions and also to provide higher security to TVSS, space saving and assembly simplification.