The C080L420FM is a Schneider Electric ComPacT NS new generation 4-pole circuit breaker rated 800 A at 50 °C, with a MicroLogic 2.0 electronic trip unit providing L (long-time overload) and I (instantaneous short-circuit) protection. It's built to EN/IEC 60947-2, so it's certified for distribution duty in industrial switchgear — not a residential load center breaker. That's a high interrupting rating for a fixed-mount breaker this size; it's sized for main or large feeder positions in a panel.
Deployment context
This breaker mounts fixed to a backplate — no DIN-rail clip, no draw-out cradle. The 280 mm width and 327 mm height mean it needs a dedicated cutout or mounting plate, not a standard 35 mm rail. Front connections both top and bottom, with a 70 mm connection pitch, so plan your busbar or cable lugs accordingly. The IK07 impact rating means it'll survive a tool bump during commissioning.
The MicroLogic 2.0 trip unit is electronic, so it gives you adjustable long-time and instantaneous pickup, plus a thermal memory that remembers a prior overload for 20 minutes — useful for motor starts that might otherwise nuisance-trip on a second attempt. Electrical durability is 2000 cycles at full rated current, 4000 at half load; mechanical durability is 10,000 cycles. That's enough for a main breaker that sees maybe a few operations a year, but not for a switching duty cycle.