4000 A drawout breaker for main distribution
The 55 kA Icu at 440 V AC (42 kA at 690 V) means it can safely interrupt fault currents up to that level without upstream cascading, per IEC 60947-2 Category B. Drawout mounting lets you rack the breaker out for maintenance or replacement without de-energizing the bus — a critical feature for continuous-process plants where downtime is measured in minutes, not hours.
With 55 kA Ics at 440 V — equal to its Icu — this breaker gives full service-level fault clearance without needing a downstream fuse assist. The 25 ms maximum breaking time means fast arc extinction, which matters when coordinating with downstream feeders in a selective scheme.
Drawout mounting on a rail support, rear-connected, with vertical or horizontal connection positions. The 115 mm connection pitch without spreader matches standard busbar layouts. IP40 protection means it's enclosed against tools and small wires but not sealed — install in a clean, dry switchgear cubicle.