30 amp. ENGINE COMPARTMENT. Fusible link. A electrical safety device that removes electrical current from an electrical circuit when the current in the electrical circuit is too high. Fusible Link. Included with: Fuse & relay box, Fuse & relay box Order by application, Fuse & relay box Order by description, Fuse box, Harness, Junction block, Junction block Order by description, Relay & fuse plate, Wire harness.