ABB XT4NU3150BFF000XXX Low-Voltage Circuit Breaker

ABB XT4NU3150BFF000XXX is a 3-pole Tmax XT4N molded‑case circuit breaker rated for 150 A, designed for low‑voltage distribution in industrial and commercial electrical systems. It provides thermal‑magnetic overcurrent protection with an 18 kA interrupting capacity at 600 V and supports front‑terminal mounting with front‑line/load‑side connections for easy panel installation. This 150 A frame from the XT4N family measures about 6.3 in high, 4.13 in wide, and 3.25 in deep, and the BFF000XXX suffix specifies the device configuration within the catalog. Typical applications include feeders, distribution panels, and motor circuits where reliable short‑circuit protection and selective tripping are required.