The C11E34V050L is a Schneider Electric ComPacT NSXm earth leakage circuit breaker with a 50 A MicroLogic 4.1 electronic trip unit, rated 16 kA at 415 V AC. It's a 3-pole unit in the grey (RAL 7016) enclosure, designed for distribution panelboards where you need both overcurrent and earth leakage protection in one device. That matters on motor or transformer feeders where repeated reclosing can damage windings.
If your panel runs hotter, you derate per the IEC 60947-2 thermal curve — standard practice for any enclosed distribution board. That is the 'E' performance level in Schneider's naming. Earth leakage sensitivity is selectable from 30 mA up to 5 A, for both class A (pulsating DC) and class AC (sinusoidal AC) fault types. That range covers everything from personnel protection (30 mA) to fire protection (300 mA) to equipment protection (1–5 A) on a single breaker — just dial in the sensitivity that matches your circuit's leakage budget.
Mounts on a backplate in either horizontal or vertical orientation, flat against the panel. The 9-module width (108 mm) fits standard DIN-rail enclosures, though the breaker itself clips to a backplate, not a DIN rail. Front-facing terminals on both line and load sides simplify busbar connections and cable dressing in a distribution board. IP40 front face and IK07 impact rating mean it's protected against tools and small solids in the panel, but it's not washdown-rated — keep it inside a dry enclosure, not on the plant floor exposed to hose spray.