What the C-curve and 32 A rating mean for your panel
The Siemens 5SJ3132-7 is a 1-pole miniature circuit breaker from the SENTRON 5SJ3 series, rated 32 A at 240 V AC with a C-curve tripping characteristic — meaning it holds up to 5–10× rated current for short durations, then trips instantaneously on a hard fault. The 4.5 kA breaking capacity (per EN 60898) handles typical residential and light commercial fault levels; if your service entrance can deliver higher prospective short-circuit current, step up to a 10 kA rated MCB like the 5SL4 series.