This is a 4 poles basic frame for Compact NSX250B. Compact NSX is designed to optimize space and breaking capacity for all standard and specific applications. This basic frame comes without trip unit, and is compatible with any type of trip unit which has to be ordered separately The breaking capacity Icu is 25kA at 415VAC 50/60Hz. The operational voltage is 690VAC 50/60Hz (limited to 440VAC 50/60Hz if there is an earth-leakage protection). It can be equipped with a variety of optional functions and accessories. The dimensions are 140mm x 161mm x 86mm. It ensures compliance with international standards (IEC 60947), CCC, EAC and marine specifications. Compact NSX250B is part of Schneider Electric EcoStruxure Power architecture.