Technical Parameters Parameter Specification Product Name Schneider Electric ComPacT NSX250H MCCB Device Type Molded Case Circuit Breaker Series / Range ComPacT NSX new generation Rated Current (In) 250 A at 40 °C (typical frame rating) Poles 3P (three poles) or 4P (with neutral version available) Rated Operational Voltage (Ue) 690 V AC, 50/60 Hz Rated Insulation Voltage (Ui) 800 V AC Rated Impulse Withstand Voltage (Uimp) 8 kV Network Type AC power distribution Utilisation Category Category A (IEC/EN 60947‑2) Ultimate Short‑Circuit Breaking Capacity (Icu) 70 kA @ 380/415 V AC Other Icu Ratings Up to 100 kA @ 220/240 V AC; 65 kA @ 440 V AC; 50 kA @ 500 V AC; 35 kA @ 525 V AC; 10 kA @ 660/690 V AC Breaking Capacity Code H (70 kA @ 415 V AC) Trip Unit Options Thermal‑magnetic (e.g., TMD), Electronic (e.g., Micrologic) Trip Unit Protection Functions Overload (Long‑time), Short‑time/Instantaneous (varies with trip unit) Control / Operation Manual toggle handle or optional motor drive Degree of Protection IP40 Connection Type Screw connection for main circuit Mounting Style Fixed panel mounting Suitable for Isolation Yes, IEC/EN 60947‑2 compliant Typical Applications Main and feeder protection in industrial/commercial electrical distribution