Ama-circuit breaker e-Molded Case(MCCB) amadivayisi okuvikela asetshenziswa kabanzi ezinhlelweni zokusabalalisa ezisebenzisa amandla aphansi. Asetshenziswa kakhulu ukuhlinzeka ngokuvikelwa kokulayisha ngokweqile, ukujikeleza okufushane kanye nokuvikelwa okungaphansi kwamandla kagesi emigqeni nasemishinini, futhi anomsebenzi wokuhlukanisa imithombo yamandla. Intengo yawo ithonywa kakhulu yizici ezifana nomkhiqizo, amandla kagesi alinganisiwe, amandla okuphuka kanye nokucushwa kokusebenza. Ngokuvamile, intengo yama-circuit circuit breakers ajwayelekile asekhaya aqala ku-50 kuya ku-1,000 yuan, phakathi kwawo imikhiqizo enamandla angaphansi kuka-100A ivame ukuba nentengo ephakathi kuka-50 no-300 yuan. Intengo yemininingwane yamandla kagesi amakhulu (250A kuya ku-800A) icishe ibe yi-300 kuya ku-3,000 yuan. Imikhiqizo yemikhiqizo yamazwe ngamazwe njengeSchneider Electric, ABB kanye neSiemens ibiza kakhulu. Intengo yeminye imikhiqizo ehlakaniphile ingafinyelela izinkulungwane eziningana zama-yuan.

Ama-circuit breaker ahlanganisiwe asetshenziswa kakhulu ezitshalweni zezimboni, ezakhiweni zezentengiselwano, ezinhlelweni zokusatshalaliswa kwamandla zokuhlala, amakhabethe okusabalalisa amandla, izinhlelo zokukhiqizwa kwamandla e-photovoltaic kanye nokwakhiwa kwengqalasizinda, njll. Emkhakheni wezimboni, angasetshenziswa ukuvikela ama-motor kagesi, imishini yokukhiqiza kanye nemigqa yokusabalalisa. Emkhakheni wokwakha, avame ukusetshenziswa njengeswishi eyinhloko noma iswishi yegatsha yekhabhinethi yokusabalalisa ukuqinisekisa ukusebenza okuphephile nokuzinzile kohlelo lokuphakelwa kwamandla.