DC fuse ni igikoresho cyagenewe kurinda imiyoboro y'amashanyarazi ibyangijwe n’umuvuduko ukabije, ubusanzwe bituruka ku kurenza urugero cyangwa kumuzunguruko mugufi.Nubwoko bwibikoresho byumutekano byamashanyarazi bikoreshwa muri sisitemu yamashanyarazi ya DC (itaziguye) kugirango irinde imiyoboro ikabije kandi ngufi.
DC ya DC isa na AC fus, ariko yagenewe byumwihariko kugirango ikoreshwe mumuzunguruko wa DC.Mubisanzwe bikozwe mubyuma bitwara cyangwa ibivanze bigenewe gushonga no guhagarika uruziga mugihe ikigezweho kirenze urwego runaka.Fuse irimo umurongo muto cyangwa insinga zikora nkibintu byayobora, bifashwe muburyo bwimiterere kandi bigashyirwa muburinzi.Iyo umuyoboro unyura muri fuse urenze agaciro kagenwe, ikintu kiyobora kizashyuha kandi amaherezo kigashonga, kumena uruziga no guhagarika imigendekere yumuriro.
Amashanyarazi ya DC akoreshwa muburyo butandukanye bwa porogaramu, zirimo amashanyarazi y’amashanyarazi n’indege, imirasire yizuba, sisitemu ya batiri, nandi mashanyarazi ya DC.Nibintu byingenzi byumutekano bifasha kurinda inkongi yumuriro nibindi byago.