This ComPacT NSX400HB1 is a complete 3P 3d fixed circuit breaker designed to optimize space and breaking capacity. It is an optimal choice for motor protection applications. The breaking capacity (Icu) is 85 kA rms at 500 VAC 50/60 Hz and 75 kA rms at 690 VAC 50/60 Hz. The operating voltage is 690 VAC 50/60 Hz. This product features a MicroLogic 2.3 M electronic trip unit with a rating of 320 A. The MicroLogic 2.3 M trip unit offers adjustable long and short time protection functions and fixed instantaneous protection. This 3-pole version (140 mm x 255 mm x 110 mm) is supplied with a wide range of optional features and accessories. It is compliant with international standards (IEC 60947), CCC, EAC and marine specifications. ComPacT NSX400HB1 is part of Schneider Electric's EcoStruxure Power architecture.