The Siemens SENTRON 5SY3032-7KL is a 1P+N miniature circuit breaker rated at 32 A with a C-curve trip characteristic and 4.5 kA breaking capacity at 230 V AC. This is the current-production MCB from the SENTRON line, still in active manufacture.
The 32 A rating with C-curve characteristic means this breaker holds through moderate inrush and trips on sustained overloads. In a DIN-rail panel, the 1P+N configuration with neutral switching opens and closes the neutral pole with the line. Mounts on standard rail with a single width unit of 18 mm, so it occupies one position in a distribution board.