The Schneider Electric C11E4TM050L is a ComPacT NSXm 4-pole circuit breaker rated 50 A at 40 °C, with a TM-D thermal-magnetic trip unit and a breaking capacity of 16 kA at 415 V AC (performance level E).
Mounting and connections — what fits where
The 9 mm pitch works out to 12 modules wide — 108 mm width, 137 mm height, 80 mm deep. That's a standard DIN-rail footprint for the NSXm family; you'll need 12 module spaces on the rail. Connection terminals are Everlink lugs: one per pole, accepting 2.5–95 mm² rigid or stranded aluminium/copper, or 2.5–70 mm² flexible copper. Connection pitch is 35 mm with spreaders, 27 mm without. Both upside and downside connections are front-facing, so the breaker can be wired from the front of the panel without rotating it. The grey RAL 7016 colour is the standard industrial finish.