... cacapity CKD (Inner parts) supplier BKN Mini Circuit Breaker (MCB)Application:BKN series mini circuit breakers are mainly used for overload and ... short circuit protectionwithin the circuit of AC 50Hz, 230V in single-pole, 400V in ... 40, 50, 63A4) Breaking capacity: 3, 6kA5) Number of poles: 1, 2, 3, 46) Standards: IEC60898, IEC947-2 BKN Mini Circuit Breaker (MCB)