The ABB XT6NU3800KFF000XXX is a 3-pole molded case circuit breaker from the XT6N series, rated 800 A and fitted with an EKIP M DIP I (MCP) 800 electronic trip unit. The FF UL designation indicates it carries UL certification for the US market.
The 800 A frame and trip rating place this MCCB squarely in the heavy-feeder or main-switch role for large motor control centers, distribution switchboards, or industrial panelboards. The EKIP M DIP I trip unit is a microprocessor-based, adjustable electronic trip with LSI (long-time, short-time, instantaneous) protection curves — it gives the commissioning engineer granular coordination tuning without swapping thermal elements. The MCP (Motor Circuit Protector) variant is specifically intended for motor branch-circuit protection per UL 489 and NEC Article 430, meaning it can be paired with a contactor or starter to form a combination motor controller.