The Schneider Electric MGN19755 is a 2-pole residual current breaker with overcurrent protection (RCBO) from the Acti9 DCP Vigi range, combining a 20 A thermal-magnetic MCB with integrated 30 mA earth-leakage protection in a single DIN-rail module. Breaking capacity is 10 kA Icn / Icu at 220–240 V AC, 50 Hz, certified to EN/IEC 61009-2-1 and EN/IEC 60947-2, meaning it can safely interrupt a fault current up to 10 kA without welding its contacts or cascading failure upstream — adequate for most TN and TT systems where the prospective short-circuit current at the board stays under that threshold.
Clip-on mounting to a 35 mm DIN rail, 4 × 9 mm pitches wide (36 mm), occupying two modular spaces in a distribution board — standard for a 2P RCBO in the Acti9 family. Tunnel terminals accept 1 to 35 mm² rigid or 1 to 25 mm² flexible cable; strip length 12 mm, tightening torque 2 N·m. IP20 finger-safe (IP40 in modular enclosure) — suitable for enclosed panel installation, not for outdoor or washdown exposure.
The paperwork — CE, EN/IEC standards compliance, and manufacturer traceability — is clean for import clearance under HS code 8536.30 (apparatus for protecting electrical circuits).