The MGN19745 is a 4-pole Acti9 DCP Vigi residual current breaker with overcurrent protection (RCBO) from Schneider Electric. It combines a 20 A thermal-magnetic MCB with integrated 30 mA earth-leakage protection in one DIN-rail module — one part covers both overload and ground-fault on a final subcircuit. Rated 20 A with a B-curve (magnetic trip 3–5 × In), so it clears short-circuit fast on resistive or light inductive loads — typical for lighting, socket outlets, or small motor branch circuits where nuisance tripping from inrush is low. The 6 kA breaking capacity (Icn at 380–415 V AC, 50 Hz) matches standard domestic and light commercial distribution boards; the 6 kA Icu per EN/IEC 60947-2 confirms it can interrupt a fault at that level and still be reused after inspection. Integrated 30 mA earth-leakage detection covers personnel protection (indirect contact) and fire risk from leakage — no separate RCCB needed upstream.
Clip-on mount to standard 35 mm DIN rail. Occupies 8 × 9 mm pitches (72 mm wide) — a compact 4P RCBO footprint that fits modular distribution boards without crowding adjacent ways. Height 85 mm, depth 76 mm; the depth is shallow enough for shallow enclosures but check gland-plate clearance if the board is tight. Tunnel terminals accept 1–35 mm² rigid or 1–25 mm² flexible copper; strip 12 mm, tighten to 2 N·m. IP20 finger-safe on the front face; IP40 inside the modular enclosure once installed.
Listed as current production (active lifecycle). The Acti9 range is Schneider's standard modular protection platform — widely stocked, with no announced end-of-life for the DCP Vigi series.