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NSX250/3P 250A

The Schneider Electric Masterpact NSX250 is a high-performance, three-pole, 250A molded case circuit breaker (MCCB) from the flagship Masterpact NSX range. Designed for critical power distribution in commercial, industrial, and infrastructure applications, it provides superior protection, advanced connectivity, and exceptional ease of maintenance.

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Parameter Value / Description Product Line / Frame Size Masterpact NSX250 Rated Current (In) 250 A (Frame rating. Operational current is set and adjusted via the installed electronic trip unit). Number of Poles 3 Breaking Capacity (Key Selection) Must be specified: • N (Standard): ~50 kA Icu • S (Standard High): ~70 kA Icu • H (High): ~100 kA Icu • L (Extreme High): ~150 kA Icu *Example: NSX250N, NSX250H Rated Ultimate Breaking Capacity (Icu) Depends on selected rating. e.g., H rating: 100 kA at 415V AC (IEC 60947-2). Rated Operational Voltage (Ue) Up to 690 V AC Trip Unit (Must be Specified) Electronic Micrologic only. Comprehensive range: • Basic Protection: Micrologic 2.0A - 6.0A (LSI protection). • Protection + Measurement: Micrologic 5.0E - 6.0E (adds power/energy metering). • Protection + Communication: Micrologic 5.0A/6.0A/7.0A (adds embedded comms). Communication Native in Micrologic "A" and "E" series. Supports Ethernet, Modbus TCP, Profibus DP, etc., for direct integration into EcoStruxure Power and other management systems. Standard IEC 60947-2 Mounting Style Primarily Withdrawable (standard racking mechanism for easy maintenance). Also available in Fixed version. Connection Front or Rear connection (depends on kit). Width (Withdrawable 3P) Approximately 165 mm