The Schneider Electric C080B4FM is a ComPacT NS800LB new generation basic frame — a 4-pole, fixed-mount, manually operated air circuit breaker rated 800 A at 50 °C with a 200 kA Icu at 415 V AC. It ships without a protection unit, so you add the trip relay separately. This is the skeleton of a high-current distribution breaker for IEC 60947-2 panels.
At 690 V AC the Icu drops to 75 kA, which still covers most industrial secondary-distribution scenarios. The Icw of 19.2 kA for 1 second gives you selectivity headroom for downstream breakers to clear before the main trips.
Fixed mount on a backplate with 70 mm connection pitch. At 280 mm wide, 224 mm high, 147 mm deep, it fits standard switchgear cubicles. IP40 front-face protection with IK07 impact rating; pollution degree 3 per IEC 60947 means it tolerates conductive dust in industrial environments. Class II insulation on the front face — no protective earth connection needed on the operator side.
Electrical ratings and isolation
Rated insulation voltage 800 V AC, operational voltage 690 V AC, impulse withstand 8 kV. The integral instant protection threshold is set at 40 kA. Power losses run 20 W at rated current. Mechanical durability is 10,000 cycles.