It protects a single outgoing circuit against overload, short-circuit (thermal-magnetic trip, C-curve, 5...10 x In magnetic threshold), and earth leakage (30 mA sensitivity). The 25 A rated current and 4500 A breaking capacity at 230...240 V AC 50 Hz conform to EN/IEC 61009-2-1, the standard for residual-current-operated circuit-breakers with integral overcurrent protection.
Clip-on mounting to DIN rail (EN/IEC 60715). Neutral is on the left; phase on the right. Terminals accept 1...16 mm² rigid or 1...10 mm² flexible, with a 15 mm strip length and 2 N·m tightening torque. IP20 on the body, IP40 inside a modular enclosure — fine for distribution boards inside a cabinet, not for wet-area installation.
