1SYS271112R0405

The ABB 1SYS271112R0405 (SB201M-B40 NA) is a high-quality single-phase and neutral miniature circuit breaker designed to provide reliable protection against electrical overloads and short circuits. Manufactured by ABB, this MCB belongs to the System pro M compact SB200M series and features a rated current of 40A, B-curve tripping characteristics, and a rated short-circuit breaking capacity of 10kA. Its 1P+N configuration combines one thermally and magnetically protected phase pole with a switched neutral pole, allowing coordinated disconnection of phase and neutral conductors during manual switching and automatic tripping.