The Schneider Electric LV848103 is a MasterPact MTZ3 fixed-mount circuit breaker, 4 poles, rated 4000 A at 40 °C. Rear connection top and bottom, so it's built for switchboard bus-stack integration, not standalone panel mounting.
Category B selectivity means this breaker is designed for full discrimination with downstream devices — a fault on a branch won't take the main feeder out. The Icw short-time withstand is 100 kA for up to 3 seconds, which gives downstream breakers time to clear before the main trips. That's the spec that matters for coordination studies in a distribution board. Rated insulation voltage is 1000 V AC, operational voltage 690 V AC. Impulse withstand at 12 kV.
Physical fit
Fixed mounting on rails or base plate. Width 997 mm, height 352 mm, depth 300 mm. Connection pitch 230 mm. That depth is the overall front-to-back dimension including the mechanism — verify cabinet depth before specifying. Neutral position is right.
Standards and documentation
Compliant with EN/IEC 60947-1, EN/IEC 60947-2, and Annex H for selective coordination. Also meets IEC 61557-12 for power metering. Suitability for isolation confirmed per EN/IEC 60947-2. IP30 protection — not for washdown, but fine in a clean switchroom.