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 85kA rms at 500VAC 50/60Hz and 75kA rms at 690VAC 50/60Hz.The operational voltage is 690VAC 50/60Hz.This product embeds an electronic Micrologic 2.3 M trip unit, with 320A rating.Micrologic 2.3 M trip unit provides adjustable long time and short time protections, and fixed instantaneous protection.This 3 poles version (140mm x 255mm x 110mm) comes with a variety of optional functions and accessories.It is compliant with international standards (IEC 60947), CCC, EAC and marine specifications.Compact NSX400HB1 is part of Schneider Electric EcoStruxure Power architecture.