The C11E3TM050L is a Schneider Electric ComPacT NSXm 3-pole thermal-magnetic circuit breaker, rated 50 A at 40 °C with a 16 kA breaking capacity at 415 V AC (performance level E). The thermal-magnetic trip unit (TM-D) gives instantaneous magnetic protection on short-circuit plus a thermal bimetal for overload; no earth-leakage module here, so it's a straight feeder or branch breaker. Mounted in a 35 °C panel or with side-by-side breakers, you'd apply the manufacturer's temperature derating curve — the 40 °C baseline is the reference point, not a margin.
Mounts on a backplate (not DIN rail — this is a bolted breaker for distribution boards). 9 module pitches wide at 81 mm, 137 mm tall, 80 mm deep. Connection pitch is 35 mm with spreaders, 27 mm without — that's the busbar or cable landing spacing. The Everlink lug terminals accept 2.5–95 mm² rigid aluminium/copper or 2.5–70 mm² flexible copper, which covers the full range for a 50 A feeder. Front connections both top and bottom; no rear or plug-in option on this variant. The grey RAL 7016 finish is standard for Schneider's ComPacT range; the flag indicator (green) shows auxiliary contact presence without opening the door.