I-DC fuse sisixhobo esenzelwe ukukhusela iisekethe zombane ekonakalisweni ngumbane ogqithisileyo, odla ngokubangelwa kukugqithiswa kakhulu okanye isekethe emfutshane. Luhlobo lwesixhobo sokhuseleko lombane esisetyenziswa kwiinkqubo zombane ze-DC (direct current) ukukhusela iisekethe ezingaphezulu kunye nezimfutshane.
Iifusi zeDC zifana neefusi zeAC, kodwa zenzelwe ngokukodwa ukusetyenziswa kwiisekethe zeDC. Ngokwesiqhelo zenziwe ngesinyithi esiqhubayo okanye i-alloy eyenzelwe ukunyibilikisa nokuphazamisa isekethe xa umbane udlula inqanaba elithile. Ifusi iqulethe umcu omncinci okanye ucingo olusebenza njengesixhobo esiqhubayo, esibanjwe kwindawo yaso sisixhobo esixhasayo kwaye sivalelwe kwi-casing ekhuselayo. Xa umbane ohamba ngefusi udlula ixabiso elilinganisiweyo, i-element eqhubayo iya kufudumala kwaye ekugqibeleni inyibilike, iphule isekethe kwaye iphazamise ukuhamba kombane.
Iifusi zeDC zisetyenziswa kwiintlobo ngeentlobo zezicelo, kuquka iinkqubo zombane zeemoto nezomoya, iiphaneli zelanga, iinkqubo zebhetri, kunye nezinye iinkqubo zombane zeDC. Ziluphawu olubalulekileyo lokhuseleko olunceda ekukhuseleni kwimililo yombane kunye nezinye iingozi.