ABB XT5HU330ABNN000XXX Molded Case Circuit Breaker

ABB SACE Tmax XT5H 400 3-pole molded case circuit breaker, model XT5HU330ABNN000XXX, is a front-terminal, fixed-trip MCCB in the XT5 family that uses a thermomagnetic release (TMA) for overload and short-circuit protection in three-phase, 400 V AC power circuits. It is designed for a nominal current rating of 330 A (In) with a TMA trip unit that covers a 300–3000 A adjustment range, allowing precise protection suited to medium-sized feeders or motor loads. The unit features a 3P FF (fixed three-pole, front terminals) configuration and is UL-listed for North American applications, making it suitable for installation in industrial distribution panels, motor control centers, and protected branch circuits. Within the XT5H lineup, high-breaking-capacity variants exist, with XT5H 400 configurations offered to accommodate demanding short-circuit ratings (configurations in the XT5H family can reach substantial Icu values depending on the exact variant). As part of ABB’s Tmax XT5 line, this model emphasizes reliability, modular installation, and compatibility with standard protection schemes in industrial environments, delivering dependable disconnection and coordination for critical loads.