The Schneider Electric C11H34V050L is a ComPacT NSXm earth leakage circuit breaker, 3-pole, rated 50 A at 40 °C with a MicroLogic 4.1 electronic trip unit.
Push the ambient higher and you derate — the electronic trip unit compensates, but the frame and terminal limits still apply. The MicroLogic 4.1 is an electronic trip unit with integrated earth-leakage protection, adjustable sensitivity from 30 mA up to 5 A for class AC and 30 mA to 1 A for class A. That means you can set it to catch ground faults on a motor feeder or a lighting circuit without adding a separate RCD block. The 70 kA figure is the Icu (ultimate short-circuit breaking capacity) per EN/IEC 60947-2, Category A. That standard also governs the overvoltage category IV rating, meaning it's rated for installation at the origin of the installation, not just downstream sub-distribution.
The 9-module pitch (9 x 9 mm = 81 mm) plus the 108 mm width and 144 mm height fits standard distribution board cutouts. Connection is front-facing on both sides, with Everlink terminals accepting 2.5 to 95 mm² rigid or stranded aluminium/copper on the line side and 2.5 to 70 mm² fine-stranded copper on the load side. The connection pitch is 35 mm with spreaders, 27 mm without — that matters when you're laying out busbars or cable lugs in a tight enclosure. That's typical for an industrial panel environment.