The ABB NS44E-25 is a 25-ampere, 4-pole miniature circuit breaker (MCB) from the System E (S200 S-series) product line.This device is a compact MCB designed to provide simultaneous overload and short-circuit protection for all four conductors of a three-phase circuit (three phases and the neutral). It acts as an automatic switch that trips (disconnects) all poles when a fault is detected on any single pole, ensuring complete isolation of the load.
