The ABB XT7HU312EFFF000XXX is a SACE XT7H molded case circuit breaker rated for 1200 A continuous current across three poles, with a 65 kA interrupting capacity at 480 VAC. The Ekip Dip LSI trip unit gives you long-time, short-time, and instantaneous pickup adjustments, so you can coordinate selectively with downstream breakers.
At 1200 A and 65 kA SCCR, this breaker handles main incoming protection for a 480 V switchboard feeding motor control centers or large lighting panels. The UL 100% rating means it can carry full rated current continuously without derating — a real advantage in a warm enclosure where a standard 80%-rated breaker would need to be oversized. Front terminals simplify bus-bar or cable connections in a lineup; the drawout version (not this fixed-mount variant) would add cassette-style extraction for maintenance isolation.