The LV846163 is a MasterPact MTZ2 fixed circuit breaker, 3-pole, rated 1600 A at 40 °C — that is the continuous current it carries without tripping in a 40 °C ambient. The H2V performance class delivers 100 kA breaking capacity at 415 V AC (Icu and Ics both 100 kA at 440 V AC), so it clears a fault up to that level and is rated to reclose after a service-break event. Category B selectivity means it coordinates with downstream breakers to isolate only the faulted branch, keeping the rest of the distribution live. The 422 mm width, 352 mm height, and 300 mm depth fit standard switchboard compartments — verify the enclosure cutout against the connection pitch of 115 mm. The breaker is suitable for isolation (visible gap confirmation) per EN/IEC 60947-2.
Integration checklist for panel builders
Fixed mounting on rails or a base plate — no draw-out cradle. Front or rear connection on both sides gives flexibility for cable or busbar entry. The IP30 finger-safe front cover is standard; if the breaker is mounted in a higher-IP enclosure, the overall assembly meets the required protection. Power dissipation is 170 W at rated current — factor that into enclosure ventilation. Above 2000 m altitude, derate per the manufacturer's curve.