The Schneider Electric C11F4TM080L is a ComPacT NSXm moulded-case circuit breaker rated 80 A at 40 °C, four-pole (4P), with a 36 kA breaking capacity at 415 V AC — performance level F. It uses a thermal-magnetic TM-D trip unit, so overload and short-circuit protection sit in one device; no separate relay or CT needed for distribution boards up to that fault level.
Push ambient higher and you derate; the TM-D curve shifts with temperature, but at 40 °C you get the full 80 A. 36 kA at 415 V AC (Icu) means the breaker can safely interrupt a fault current up to 36,000 A once and still be usable afterward. That's enough for most secondary distribution panels downstream of a transformer; upstream of that you'd need a higher-rated device or a current-limiting fuse ahead. EN/IEC 60947-2 is the standard for low-voltage switchgear and controlgear — it certifies the breaker for isolation (suitability for isolation is marked on the device) and defines the utilisation category A (non-delayed, no intentional short-time delay). So it's a straight distribution breaker, not a motor-circuit protector with adjustable delays.
Mounts on a backplate — not DIN-rail — so plan for screw-fixed chassis mounting in the enclosure. Front connections top and bottom; the Everlink lug terminals accept 2.5 to 95 mm² rigid or stranded aluminium/copper, or 2.5 to 70 mm² flexible copper. That range covers most panel feeder and downstream cable sizes without needing adapters. IP40 front face (finger-safe), IK07 impact resistance. The 4-pole version has neutral on the left, and the 12-module 9 mm pitch width (108 mm) fits standard cutouts.