Siemens Miniature circuit breaker, C-curve, 1+N-P, 230V, 10kA, 40AProduct Overview The Siemens 5SL4540 7 is the Siemens SENTRON 5SL4 miniature circuit breaker, 1+N pole, 40 A, with C tripping characteristic. It provides reliable overload and short circuit protection for single phase AC circuits and is suitable for residential, commercial and light industrial distribution boards or control panels. Key Features Miniature circuit breaker (MCB), 1+N pole configuration Rated current: 40 A at standard reference