DC Miniature Circuit Breaker MCB Mini Circuit Breaker 1,1A,2A,3A,5A,6A,10A,15A,20A, ... Breaking DC Mini Circuit Breaker(MCB)ker(hereafter ref The KMB2Z-63 series DC Mini Circuit Breakers to as circuit breaker)(MCB), is suitable in nominal current 63A ... and below, direct-current rated voltage 600V. Uses for carries on the overload, short circuit ...