MasterPact NT and NW is the proven generation of air circuit breakers up to 6300 A, which incorporate the latest technologies. The MasterPact NT and NW consists of 3 sizes, NT from 630 to 1600A, NW from 800 to 4000A and NWb from 4000 to 6300A. It can be configured as a fixed installation or withdrawable device, or as a circuit breaker or load breaker. The integrable MicroLogic protection and tripping device can be equipped with a wide range of functions and accessories. MasterPact NW 1250A N1 Icu air circuit breaker is 42kA at 440V 4-pole basic switch fixed installation without Micrologic The Masterpact can be ordered via the online configurator.