Specifications General Product Type: Molded Case Circuit Breaker (MCCB) Series / Family: ComPacT NSX N‑Frame Number of Poles: 3 (three phases) Rated Current (In): 400 A Mounting Type: Fixed panel or distribution board installation Application: Protection of low‑voltage three‑phase power distribution circuits Electrical Ratings Rated Operational Voltage (Ue): Designed for low‑voltage AC systems (commonly up to ~690 V AC) Rated Frequency: 50/60 Hz Rated Insulation Voltage (Ui): Suitable for standard low‑voltage distribution insulation requirements Rated Impulse Withstand Voltage (Uimp): Capable of withstanding typical transient overvoltages Protection & Trip Characteristics Trip Mechanism: Thermal‑magnetic or electronic trip unit (depending on configuration) Overload Protection: Responds to sustained overload currents Short‑Circuit Protection: Responds rapidly to high fault current conditions Trip Behavior: Combined thermal and magnetic action for consistent protection Breaking Capacity & Performance Breaking Capacity: Engineered to safely interrupt fault currents typically encountered in low‑voltage distribution systems Performance: Reliable fault clearing to protect circuits, wiring, and connected equipment Mechanical & Environmental Terminal Connections: Screw or clamp terminals for secure conductor attachment Mechanical Durability: Built for dependable operation and repeated switching cycles Design: Compact modular housing suitable for integration into panels and switchboards