Specifications Parameter Specification Manufacturer Schneider Electric Product Range ComPacT NSX400 MCCB Model / Type 3‑Pole 400 A with MicroLogic 5.3 electronic trip unit Device Type Molded Case Circuit Breaker (MCCB) Rated Current (In) 400 A at 40 °C operating temperature standard rating Poles 3P / 3D (three phases protected) Trip Unit MicroLogic 5.3 electronic (LSI functions: Long‑time, Short‑time, Instantaneous) Network Type AC (three‑phase) 50/60 Hz Rated Operational Voltage (Ue) 690 V AC, 50/60 Hz Rated Insulation Voltage (Ui) 800 V AC Impulse Withstand Voltage (Uimp) 8 kV Breaking Capacity (Icu) See specific variant but typical high range up to 200 kA @ 220/240 V AC; 80 kA @ 660/690 V AC (type‑dependent) Utilisation Category Category A (general distribution) Long‑Time Pickup Range Adjustable (e.g., ~160…400 A) Short‑Time Pickup Adjustable range (~1.5…10 × In) depending on unit/settings Instantaneous Pickup Adjustable (varies by trip unit version) Thermal Memory ~20 minutes before/after trip (typical electronic behavior) Mounting Mode Fixed (panel/switchboard) Local Signalling LED indicators for status & fault (varies by trip unit) Standards Compliance EN/IEC 60947‑2 for MCCBs