Ƙaramin na'urar busar da'ira ta jerin C50 tana da ƙaramin girma, nauyi mai sauƙi, tsarin sabon abu da kuma kyakkyawan aiki. Ana sanya su a cikin allon rarrabawa mai haske kuma ana amfani da su a gidajen baƙi, tubalan gidaje, manyan gine-gine, murabba'ai, filayen jirgin sama, tashoshin jirgin ƙasa, shuke-shuke da kamfanoni da sauransu, a cikin da'irar AC 240V sanda ɗaya) har zuwa 415V (sanduna 3) 50Hz don kariyar gajeriyar da'irar da ke wuce gona da iri da kuma tsarin hasken da'ira. Ƙarfin karyewa shine 3KA.
Kayayyakin sun yi daidai da ƙa'idodin BS&NEMA.
| Lambar sanda | Matsayin halin yanzu (A) | Ƙarfin wutar lantarki mai ƙima (V) | Ƙimar yin da kuma karya ƙarfin aiki (KA) | Saiti zafin kariya | |
| BS | Hukumar NEMA | ||||
| 1P | 6,10.15 | AC12 | 5 | 40℃ | |
| 20,30.40 | AC120/240 | 3 | 5 | ||
| 50.60 | AC240/415 | ||||
| 2P | 6,10.15 | AC120/240 | 3 | 40℃ | |
| 20.30,40 | AC240/415 | 3 | 5 | ||
| 3P | 50,60 | AC240/415 | |||
Lokacin da ake amfani da shi a cikin allunan rarraba crabtree da raka'o'in mabukaci, ana ɗora polestar da C50 MCB akan layukan da aka ƙera musamman don sauƙin shigarwa, polestar MCBs suma sun dace da amfani a cikin allunan da aka gina na musamman, inda ya kamata a ɗora su akan layin hula na 35mm na yau da kullun zuwa BS5584:
1978 EN50022 yana ba da hasashen a cikin daidaitaccen 70mm.