This ComPacT NSX250B is a complete 4P 4d fixed circuit breaker designed to optimize space and breaking capacity. It is an optimal choice for all standard and special applications. The breaking capacity (Icu) is 25 kA rms at 415 VAC, 50/60 Hz. The operating voltage is 440 VAC 50/60 Hz. This product features a MicroLogic 4.2 Vigi electronic trip unit rated at 250 A and integrated adjustable residual current protection. MicroLogic 4.2 Vigi also offers customizable long-term and short-term protection functions as well as fixed instantaneous protection. This 4-pole version (140 mm x 161 mm x 86 mm) comes with a wide range of optional features and accessories. It is compliant with international standards (IEC 60947), CCC, EAC and marine specifications. ComPacT NSX250B is part of Schneider Electric’s EcoStruxure Power architecture.