Eaton MPSC303MEAXX2A Magnum low voltage power circuit breaker - UL Listed

The MPSC303MEAXX2A combines a standard-frame Magnum PXR design with three poles and a drawout vertical mounting option that includes motorized racking. This feature reduces maintenance time and improves safety during breaker replacement or testing, which translates into higher plant availability and lower labor costs in switchgear applications. The Power Xpert Release (PXR20 LSI) trip unit delivers precise protection, enabling better selective coordination and reduced arc-energy exposure in motor control centers and panel boards. With a 3000 A Iu rating and a 100 kAIC interrupt capability, the device withstands heavy fault currents typical of large facilities, improving system reliability during short circuits and transient events. Its broad certification portfolio (UL Listed, CE Marked, NEMA Compliant, plus KEMA, CSA, ABS, and Lloyd’s Register) supports global project compliance and faster commissioning. The unit’s compatibility with Protective Management tools, including Power Xpert Protection Manager, enables remote monitoring and coordinated fault handling, reducing downtime and facilitating preventative maintenance strategies. Installation benefits include compatibility with standard breaker racks and existing buswork, plus straightforward field retrofit options for upgrading legacy protection without costly panel redesigns. In practice, the Magnum PXR trip unit supports zone-selective interlocking and selective protection schemes, which are essential for modern, energy-efficient distribution networks. This combination of features provides engineers with a practical path to improved reliability, safety, and lifecycle cost reduction in industrial facilities.