A fuse includes a tubular body having two ends each having a first cap, which is formed with a through hole; a fusible and breakable unit including a first fusible filament arranged inside the tubular body and having two ends extending outward through the through holes respectively; and a plurality of second caps each of which has a surface that is formed with a recessed part and an opposite surface that is provided with a conductive wire. The recessed parts of the second caps are mounted to outer circumferences of the first caps. The two ends of the first fusible filament are respectively coupled between the first caps and the second caps corresponding thereto so as to extend a distance between the two ends of the first fusible filament and thus, preventing the occurrences of electrical arc after the first fusible filament is fused and broken.