Siemens 5SL1132-7MB — 1-pole C-curve MCB, 32 A, 3 kA
The C curve means it tolerates moderate inrush (motors, capacitive loads) before tripping magnetically, so it's a common choice for general-purpose socket circuits and small equipment.
The 32 A rating at 230 V AC single-phase (253 V max) and 440 V multi-phase is the continuous current the breaker carries without nuisance tripping at 30 °C ambient. The 1-module width (18 mm) means it occupies one slot on a standard DIN-rail enclosure, so swapping into an existing 1P position takes no extra space.
The 76 mm depth (70 mm installation depth) is typical for SENTRON 5SL series MCBs; verify clearance behind the rail if retrofitting into a shallow enclosure.