Lub fuse DC yog ib lub cuab yeej uas tsim los tiv thaiv cov hluav taws xob ntawm kev puas tsuaj los ntawm cov hluav taws xob ntau dhau, feem ntau yog los ntawm kev thauj khoom ntau dhau lossis luv luv. Nws yog ib hom khoom siv kev nyab xeeb hluav taws xob uas siv rau hauv DC (direct current) hluav taws xob systems los tiv thaiv cov hluav taws xob ntau dhau thiab luv luv.
Cov fuse DC zoo ib yam li cov fuse AC, tab sis lawv tau tsim tshwj xeeb rau kev siv hauv DC circuits. Lawv feem ntau yog ua los ntawm cov hlau conductive lossis alloy uas tau tsim los yaj thiab cuam tshuam lub circuit thaum tam sim no tshaj qhov qib. Lub fuse muaj ib daim nyias nyias lossis hlau uas ua haujlwm ua lub ntsiab conductive, uas tau tuav rau hauv qhov chaw los ntawm cov qauv txhawb nqa thiab kaw rau hauv lub plhaub tiv thaiv. Thaum tam sim no ntws los ntawm lub fuse tshaj qhov ntsuas tus nqi, lub ntsiab conductive yuav kub thiab thaum kawg yaj, rhuav lub circuit thiab cuam tshuam cov dej ntws ntawm tam sim no.
Cov fuse DC siv tau rau ntau yam kev siv, suav nrog cov tshuab hluav taws xob hauv tsheb thiab dav hlau, cov vaj huam sib luag hnub ci, cov tshuab roj teeb, thiab lwm yam tshuab hluav taws xob DC. Lawv yog ib qho tseem ceeb rau kev nyab xeeb uas pab tiv thaiv hluav taws xob thiab lwm yam kev phom sij.