The Siemens 5SL3132-7MB is a SENTRON miniature circuit breaker — 1-pole, C-curve, rated 32 A at 400 V AC, with a 4.5 kA breaking capacity per EN 60898. The 4.5 kA rating means it safely interrupts a fault current up to 4.5 kA at 400 V — adequate for most residential and light commercial distribution boards where the prospective short-circuit current stays under that threshold. At 32 A, this MCB handles a 7.4 kW resistive load on a 230 V single-phase circuit or roughly 22 kW on a 400 V three-phase supply. Depth is 76 mm, which fits most flush-mount consumer units and small distribution boards.
The 18 mm width (1 MW) means it takes up one standard module slot.