It combines a 25 A thermal-magnetic trip unit (curve C) with integrated 100 mA earth-leakage protection in a single 36 mm wide module that clips onto a DIN rail.
The 25 A rated current and C-curve magnetic release (5…10 × In) mean this RCBO handles general-purpose loads like lighting, socket circuits, and small appliances where inrush from motors or capacitors is moderate. The 100 mA earth-leakage threshold is set above the 30 mA required for personal shock protection — it is sized for equipment protection or circuits where nuisance tripping from leakage in fixed appliances would be a problem. The 6 kA Icn is the short-circuit breaking capacity at service voltage; coordination with an upstream MCB or fuse is needed if the prospective fault current exceeds that level.
IP20 body means it belongs inside an enclosure — not in a wet or washdown location. The toggle provides local ON/OFF/trip indication.