The Schneider Electric Compact NSX250N 3‑Pole 125 A molded case circuit breaker (MCCB) is part of the ComPacT NSX new generation range of low‑voltage protective devices.
Specifications
Parameter Specification
Manufacturer Schneider Electric
Product Series ComPacT NSX250N
Product Type Molded Case Circuit Breaker (MCCB)
Model / Code NSX250N 3P 125A
Poles 3P (3 poles) – 3 phases protected
Rated Current (In) 125 A at 40 °C
Rated Operational Voltage (Ue) 690 V AC, 50/60 Hz
Network Type AC three‑phase
Trip Unit Type TMD (Thermal‑magnetic) – adjustable thermal overload + fixed magnetic
Utilisation Category Category A (general distribution)
Rated Ultimate Short‑Circuit Breaking Capacity (Icu) • 90 kA @ 220/240 V AC
• 50 kA @ 380/415 V AC
• 50 kA @ 440 V AC
• 36 kA @ 500 V AC
• 35 kA @ 525 V AC
• 10 kA @ 660/690 V AC (IEC)
Rated Insulation Voltage (Ui) 800 V AC
Rated Impulse Withstand Voltage (Uimp) 8 kV
Suitability for Isolation Yes (conforming to EN/IEC 60947‑2)
Mounting / Installation Fixed panel mount (not DIN rail by default)
Control Type Manual toggle operator
Degree of Protection IP40 (front)
Applications Industrial and commercial power distribution circuit protection