The Schneider Electric NSX250S DC 4‑Pole Circuit Breaker is a high‑performance molded case circuit breaker (MCCB) specially designed for direct current (DC) applications in low‑voltage power distribution systems.
Specifications
General
Product Type: DC Molded Case Circuit Breaker (MCCB)
Series / Family: NSX S‑Frame
Number of Poles: 4 (all DC poles)
Rated Current (In): 200 A
Mounting: Fixed panel or switchboard installation
Application: Protection of low‑voltage DC distribution circuits
Electrical Ratings
Rated Operational Voltage (Ue) – DC: Suitable for DC power systems (typical systems include battery banks, photovoltaic systems, DC microgrids, etc.)
Rated Frequency: Direct current (DC) applications
Rated Insulation Voltage (Ui): Designed for DC distribution system insulation requirements
Rated Impulse Withstand Voltage (Uimp): Withstands transient overvoltages in DC environments
Protection Characteristics
Overload Protection: Provided — responds to sustained overcurrent conditions
Short‑Circuit Protection: Provided — interrupts high fault current events
Trip Mechanism: Thermal‑magnetic or electronic trip unit tailored for DC use
Poles: Four‑pole configuration for full DC circuit isolation
Breaking Capacity & Performance
High Breaking Capacity: Engineered to interrupt fault currents encountered in DC power systems
DC Breaking Performance: Designed to extinguish DC arcs and safely interrupt DC fault conditions
Performance: Reliable protection to minimize equipment damage and maintain system safety
Mechanical & Environmental
Terminal Connections: Screw or clamp terminals for secure DC conductor attachment
Mechanical Durability: Built for repeated operations and long service life
Design: Compact modular housing for space‑efficient panel integration
Installation: Suitable for switchboards, power control panels, and DC distribution boards