What the 5000 A and 100 kA ratings mean for your switchboard
The LV848195 is a MasterPacT MTZ3 50 H1 fixed-mount circuit breaker rated 5000 A at 40 °C with an H1 performance class delivering 100 kA Icu at 415 V AC. That 100 kA holds across the full operating voltage range up to 690 V AC, so the breaker clears a fault at the same interrupting capacity whether it sits on a 415 V or 690 V bus. The Icw rating of 100 kA for 3 s means it withstands a delayed trip coordination window without damage — essential for selective coordination (Category B per IEC 60947-2) where downstream breakers clear first and this unit holds in. The 420 W power dissipation at rated current matters for enclosure thermal design — a switchboard housing this unit needs ventilation or forced cooling to stay within the -25 to 70 °C operating range.
Standards compliance and isolation suitability
Physical integration — fixed-mount, rear-connected, 4P
Fixed-mount design with rear connection on both the line and load sides. The 997 mm width, 352 mm height, and 300 mm depth define the panel cutout and busbar layout. Connection pitch is 230 mm, which matches standard MasterPacT busbar systems. Mounting support is rails or base plate — the breaker bolts into a dedicated cradle, not a DIN rail. The neutral pole is on the right (4P, neutral right), so busbar phasing must follow that orientation.
Durability and operating conditions
Mechanical durability is 10,000 cycles with periodic preventive maintenance. Electrical durability under AC-3 switching duty is 6000 cycles at 440/690 V AC. IP30 protection means it is not washdown-rated — install inside a switchboard enclosure.