I-DC fuse sisixhobo esiyilelwe ukukhusela iisekethe zombane kumonakalo obangelwa kukugqithiswa kwangoku, okubangelwa kumthwalo ogqithisileyo okanye isekethe emfutshane.Luhlobo lwesixhobo sokhuseleko sombane esisetyenziswa kwiinkqubo zombane ze-DC (ngokuthe ngqo) ukukhusela ngokuchasene ne-overcurrent kunye neesekethe ezimfutshane.
Iifusi zeDC ziyafana neefuse ze-AC, kodwa ziyilelwe ngokukodwa ukusetyenziswa kwiisekethe ze-DC.Ngokuqhelekileyo zenziwe ngentsimbi eqhubayo okanye i-alloy eyenzelwe ukunyibilika kunye nokuphazamisa isiphaluka xa i-current idlula inqanaba elithile.I-fuse iqulethe umgca omncinci okanye ucingo olusebenza njengento eqhubayo, ebanjwe kwisakhiwo sokuxhasa kwaye ifakwe kwi-casing yokukhusela.Xa i-current flowing through fuse idlula ixabiso elilinganisiweyo, i-conductive element iya kutshisa kwaye ekugqibeleni inyibilike, iphule isiphaluka kwaye iphazamise ukuhamba kwangoku.
I-fuses ye-DC isetyenziswa kuluhlu olubanzi lwezicelo, ezibandakanya izithuthi kunye neenkqubo zombane ze-aviation, iiphaneli zelanga, iinkqubo zebhetri, kunye nezinye iinkqubo zombane ze-DC.Ziyinkalo ebalulekileyo yokhuseleko enceda ukukhusela imililo yombane kunye nezinye iingozi.