The Schneider Electric C11H44V050L is a ComPacT NSXm 4-pole MCCB rated 50 A at 40 °C with a 70 kA breaking capacity at 415 V AC. It carries integrated earth-leakage protection with selectable sensitivity from 30 mA up to 5 A for both class A and class AC faults. That means one device handles both overcurrent and ground-fault protection — no separate RCCB needed downstream, which saves a module width on the DIN rail and simplifies the wiring bill.
The 4-pole body takes 12 module pitches at 9 mm each — 108 mm wide total — so plan for that footprint in the enclosure layout. Connection is front-facing on both line and load sides via Everlink lugs that accept 2.5 to 95 mm² rigid copper or aluminum, or 2.5 to 70 mm² fine-stranded copper. The neutral is on the left.