The Schneider Electric LV846165 is a MasterPact MTZ2 fixed-mount, three-pole circuit breaker rated for 2500 A at 40 °C, with a 100 kA ultimate breaking capacity (Icu) at 440 V AC. It sits in the MasterPacT range and is designed for main or feeder protection in power distribution — think switchboards, generator incomers, or large motor control center mains where you need Category B selectivity (meaning it can discriminate with downstream devices to keep the rest of the plant live during a fault).
The Icu of 100 kA at both 220/415 V and 440 V AC means this breaker clears a 100 kA fault without damage; the Ics (service breaking capacity) is the same 100 kA, so after clearing a fault at that level it can be reclosed and carry load again — not all breakers match Ics to Icu. The Icw (short-time withstand) of 100 kA for 1 second is what enables the selectivity coordination: downstream breakers have time to clear before this one trips. The 12 kV impulse withstand (Uimp) covers surge environments typical of industrial distribution.
Fixed-mount design — no draw-out cradle. It bolts to a base plate or rails (mounting support listed as rails/base plate). Dimensions: 422 mm wide, 352 mm high, 300 mm deep. Connection pitch is 115 mm, and both upside and downside connections accept front or rear terminations, which gives flexibility in cabinet layout — rear connection keeps busbars behind the breaker, front connection simplifies cable landing. IP30 protection means it is suited for enclosed switchgear; not for washdown environments.
The LV846165 carries approvals to EN/IEC 60947-1, EN/IEC 60947-2, EN/IEC 60947-2 Annex H (for selectivity), and IEC 61557-12 (for power metering — relevant if you fit the optional control unit). No RoHS/REACH conflict is expected for this class of industrial gear, but confirm with the factory declaration if your compliance audit requires it.