What it is and where it fits
The 2CSR256140R1325 is a 4-pole RCBO rated at 32 A with a B-curve tripping characteristic. It breaks fault currents up to 6 kA (Icn) and withstands 10 kA (Icu) without damage. At 71 mm wide it occupies four standard DIN-rail module slots; the 69 mm depth keeps it inside shallow enclosures.
What the ratings mean for your board
The B-curve characteristic trips under overload conditions. The 6 kA Icn and 10 kA Icu breaking capacities meet sub-distribution requirements. Overvoltage category III and a rated insulation voltage of 500 V confirm it for fixed installation downstream of the main incoming supply.