Fuse ni ubwishingizi butwika insinga kugira ngo hirindwe amashanyarazi menshi. Mu by’ukuri, fuse ni ubwoko bw’insinga zoroshye gutwika, ishobora kunyura gusa mu muyoboro w’amashanyarazi usanzwe, iyo amashanyarazi arenze agaciro runaka, ishyushya ikanahuza amashanyarazi, kugira ngo irinde insinga gushya, cyane cyane iyo umuyoboro mugufi w’insinga, nko kudahagarika amashanyarazi vuba, insinga mu kanya gato izaba. Muri rusange, fuse igira uruhare mu kurinda. Iyo fuse ishyizweho hano, fuse izahuza ikanahuza amashanyarazi iyo umuyoboro w’amashanyarazi wazamuwe ku buryo budasanzwe ku burebure n’ubushyuhe runaka, bityo igakora uruhare rwo kurinda imikorere y’umutekano w’uruziga.
