MasterPact MTZ is the latest generation of air circuit breakers up to 6300 A, in which advanced digital technologies are integrated. The MasterPact MTZ consists of 3 sizes, MTZ1 from 630 to 1600 A, MTZ2 from 800 to 4000 A and MTZ3 from 4000 to 6300 A. It is available in fixed or withdrawable versions, as a circuit breaker or load breaker. The integrated protection and tripping device MicroLogic X can be equipped with a wide range of functions and accessories. Open load breaker Open load breaker MasterPact MTZ3 4000A HA Icm is 187kA at 690VAC 3P basic switch without MicroLogic X fixed installation. The MasterPact MTZ can be ordered via the online configurator.