Masu karya da'irar akwati da aka ƙera(MCCB) na'urori ne masu kariya da ake amfani da su sosai a tsarin rarraba wutar lantarki mai ƙarancin wutar lantarki. Ana amfani da su galibi don samar da kariya daga lodi, gajeriyar da'ira da kuma ƙarancin wutar lantarki ga layuka da kayan aiki, kuma suna da aikin ware hanyoyin samar da wutar lantarki. Farashinsa yana da tasiri sosai ta hanyar abubuwa kamar alama, ƙimar wutar lantarki, ƙarfin karyewa da tsarin aiki. Gabaɗaya, farashin na'urorin busar da wutar lantarki na yau da kullun da aka ƙera a cikin gida sun kama daga yuan 50 zuwa 1,000, daga cikinsu samfuran da ƙarfinsu bai wuce 100A yawanci ana farashi tsakanin yuan 50 zuwa 300. Farashin manyan ƙayyadaddun wutar lantarki (250A zuwa 800A) kusan yuan 300 zuwa 3,000 ne. Kayayyakin samfuran ƙasashen duniya kamar Schneider Electric, ABB da Siemens suna da tsada sosai. Farashin wasu samfuran masu hankali na iya kaiwa yuan dubu da yawa.

Ana amfani da na'urorin karya da'ira masu siffar ƙwallo a masana'antu, gine-ginen kasuwanci, tsarin rarraba wutar lantarki na gidaje, kabad ɗin rarraba wutar lantarki, tsarin samar da wutar lantarki mai amfani da hasken rana da kuma gina kayayyakin more rayuwa, da sauransu. A fannin masana'antu, ana iya amfani da shi don kare injunan lantarki, kayan aikin samarwa da layukan rarrabawa. A fannin gini, galibi ana amfani da shi azaman babban maɓalli ko maɓalli na reshe na kabad ɗin rarrabawa don tabbatar da aiki lafiya da kwanciyar hankali na tsarin samar da wutar lantarki.