Feem ntau hais lus: qhov txias tsis kam ntawm lub fuse yog qhov tseem ceeb ntawm tus nqi ruaj khov, thaum lub zog poob (thermal resistance) yuav hloov nrog qhov kub thiab txias. Yog li ntawd, nyob rau hauv daim ntawv thov, qhov voltage poob ntawm rated tam sim no yog ib qho tseem ceeb.
fuses nrog qis qis tam sim no muaj kev tiv thaiv loj dua. Hauv kev siv hluav taws xob tsawg, qhov poob qis yuav ua lub luag haujlwm txiav txim siab. Hauv qee qhov xwm txheej, nws yuav ua rau tsis muaj peev xwm tso tawm qhov kev sim (kev thov) tam sim no.
Lub zog poob thiab txias tsis kam ntawm lub fuse feem ntau tuaj yeem hloov mus rau ib leeg.
Qhov voltage poob ntawm lub fuse yuav tsum tau kuaj nrog alternating tam sim no.
Qhov kev tiv thaiv txias ntawm lub fuse tuaj yeem kuaj nrog cov tam sim no ncaj qha.