Eaton NZMB1-A50 molded case circuit breaker - 25 kAIC

Three-pole NZMB1 design with a 50 A rating and 440 Vac maximum allows compact, high-visibility protection for distribution circuits in industrial panels. The 25 kAIC short-circuit capacity translates into faster fault clearance and reduced arc damage, improving panel uptime in harsh plant environments. This configuration is ideal for machine drives, control panels, and process equipment where reliable protection and easy upstream coordination are critical. Thermal-magnetic trip type T268 delivers selective protection against overloads and short circuits, minimizing nuisance trips while preserving equipment life. In practice, operators gain fewer unplanned stops as the trip curve matches typical load profiles in manufacturing cells, enabling better downtime planning and maintenance scheduling. Front frame clamp mounting simplifies panel installation, reduces mounting hardware, and makes retrofits faster in spaces with limited depth. Paired with the rocker lever, technicians can verify trip status at a glance, accelerating commissioning and hands-on service. Setting range 40-50A and 300-500 A trip rating provide flexibility to accommodate evolving loads without swapping devices. The NZM1 frame footprint supports consistent mounting across the Eaton NZ-series, aiding standardization across multiple lines and lockers. Compliance considerations require confirmation with the manufacturer; however, this device aligns with common industrial protection practices for 440 Vac networks, where a 25 kAIC interrupt rating supports robust fault handling in medium-large panels.