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NSX400H 3P 400A MIC2.3

The Schneider Electric ComPacT NSX400H Molded Case Circuit Breaker (MCCB) with Micrologic 2.3 electronic trip unit is a three‑pole protective device designed for electrical distribution systems. It provides reliable protection against overloads, short circuits, and electrical faults in industrial and commercial power installations. NSX series breakers are engineered for high interrupting capacity and conform to international low‑voltage protection standards, making them suitable for panelboards, switchboards, and power distribution applications requiring robust performance.

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Technical Parameters Parameter Specification Product Name Schneider Electric ComPacT NSX400H MCCB Model / Trip Unit NSX400H with Micrologic 2.3 electronic trip unit Device Type Molded Case Circuit Breaker (MCCB) Rated Current (In) 400 A at 40 °C Number of Poles 3 poles (3P) Rated Operational Voltage (Ue) Up to 690 V AC, 50/60 Hz Rated Insulation Voltage (Ui) 800 V AC Rated Impulse Withstand Voltage (Uimp) 8 kV Network Type AC, 50/60 Hz Suitability for Isolation Yes (meets EN/IEC 60947‑2 requirements) Utilisation Category Category A Breaking Capacity (Icu) Up to 100 kA at 220/240 V AC; 70 kA at 380/415 V AC (IEC 60947‑2) Breaking Capacity (UL) 85 kA at 240 V AC; 65 kA at 480 V AC (UL 508) Trip Unit Type Micrologic 2.3 electronic with protection functions (L, S, o, I) Control / Handle Type Manual toggle Protection Functions Long‑time, short‑time, instantaneous/ground fault according to Micrologic configuration Mechanical Durability Typically tens of thousands of cycles Electrical Durability Rated number of electrical operations depending on load IP Protection IP40 (typical) Standards Compliance EN/IEC 60947‑2 and applicable UL safety standards Mounting Fixed panel mounting Typical Applications Power distribution protection in industrial and commercial installations