The Schneider Electric NSX250N is a 3‑pole molded case circuit breaker (MCCB) designed for low‑voltage distribution and protection applications. It provides reliable protection against overload, short‑circuit, and electrical faults in three‑phase power systems.
Specifications
Parameter Specification
Brand Schneider Electric
Series Compact NSX
Model / Type NSX250N
Device Type Molded Case Circuit Breaker (MCCB)
Number of Poles 3‑Pole (3P)
Rated Current (In) 250 A at 40 °C
Rated Operational Voltage (Ue) Up to 690 V AC (50/60 Hz)
Rated Frequency 50 / 60 Hz
Short‑Circuit Breaking Capacity (Icu) 50 kA at 380/415 V AC
Ultimate Breaking Capacity (Icu) 90 kA at 220/240 V AC
Rated Insulation Voltage (Ui) 800 V AC
Rated Impulse Withstand Voltage (Uimp) 8 kV
Trip Unit Options Thermal‑magnetic (TMD) or Electronic (MicroLogic)
Protection Functions Overload, Short‑Circuit, (optionally ground fault with accessories)
Utilisation Category Category A (distribution)
Suitability for Isolation Yes (meets IEC/EN standards)
Mounting Type Fixed installation in panels
Connection Terminals Screw/clamp main terminals
Application Protection of three‑phase circuits, feeders, and distribution systems