This ComPacT NSX400HB2 is a complete fixed 4P 4d 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 85 kA rms at 500 VAC 50/60 Hz and 100 kA rms at 690 VAC 50/60 Hz. The operating voltage is 690 VAC 50/60 Hz. This product has a MicroLogic 6.3 E electronic trip unit with a rating of 400 A and adjustable earth fault protection (with OFF position). The MicroLogic 6.3 E trip unit offers adjustable long-term, short-term and instantaneous protection. MicroLogic 6.3 E has an integrated display for fine adjustment and display of the energy meter. This 4-pole version (185 mm x 255 mm x 110 mm) comes with various optional features and accessories. It is compliant with international standards (IEC 60947), CCC, EAC and marine specifications. ComPacT NSX400HB2 is part of the EcoStruxure Power architecture from Schneider Electric.