The MasterPact MTZ, a versatile and robust solution for ANSI C37/UL 1066 and UL 489 applications. With a rated current spanning from 800 to 6000 A and a breaking capacity of 42 to 200 kA at 480 Vac, it offers exceptional performance. This range features 3 frame sizes - MTZ1 (600 to 1600 A) and MTZ2 (800 to 4000 A) catering to diverse needs. Equipped with 3 pole and 4 pole construction, it ensures flexibility and reliability. Additionally, it boasts advanced MicroLogic X control units, such as MicroLogic 3.0 X, 5.0 X, and 6.0 X, offering enhanced protection and diagnostic functions. Furthermore, the MasterPact MTZ comes with a comprehensive selection of field-installable auxiliaries and accessories, making it a complete and customizable solution. Complementing this, the LV848891SP MDGF summing module serves as a spare part for earth fault protection, further extending the functionality of the MasterPact MTZ1/MTZ2 circuit breakers.