The MGNCB2004 is a Schneider Electric Isobar B series 4-pole molded case circuit breaker rated 200 A at 415 V AC, built to BS EN 60947-2. This is the MCCB for a 200 A distribution or motor feeder circuit — the 4P configuration handles three-phase plus neutral, common in UK and IEC panel builds where the neutral needs overcurrent protection.
Cable termination accepts 50 to 185 mm² conductors; the terminal torque spec is 15 N·m. That cross-section range suits the 200 A rating — 185 mm² is oversized for 200 A but gives flexibility for voltage drop on long runs. The 4-pole frame fits standard panel mounting; verify existing busbar or cable lug pattern against the Isobar B footprint before committing the panel layout.