Nchedo na njikwa nke sekit megide oke ibu na sekit dị mkpụmkpụ maka nrụnye ụlọ na ụlọ ọrụ mmepụta ihe.
A na-enweta HC-MCBs nwere ike ịgbawa site na 10KA&6kA ruo IEC60898.
A na-ahazi MCB ka ọ bụrụ 40 MCBs, enwere ike inye ya na nhazi gburugburu 50.
Iji nye iwu tinye na njedebe nke nọmba ndepụta MCB tag: HCxxxxH.