Specifications Parameter Specification Product Series Compact NSX (DC Version) Product Line NSX250F Number of Poles 3 Poles (3P) – For DC systems, typically used in bipolar configurations (e.g., +, -, ground) or three-wire DC systems. Rated Operational Current (In) 250 Amperes Circuit Type Direct Current (DC) Trip Unit Type DC-rated Thermal-Magnetic (TM-D) or Electronic (Micrologic DC) Rated Operational Voltage (Ue) Up to 440V DC, 500V DC, or 750V DC (model dependent – critical specification for PV applications). Breaking Capacity (Icu) Typically 15-25 kA at rated DC voltage (e.g., 25kA @ 440V DC, 15kA @ 750V DC). Must be verified based on specific DC voltage. Polarity Suitable for bipolar applications (e.g., PV string protection with +/- polarity). Arc Control Technology Specifically designed DC arc chutes with permanent magnets or other mechanisms to stretch and extinguish the DC arc safely. Standards IEC 60947-2 (Annex M for DC), UL 489B (DC Molded Case Circuit Breakers) Connection Front or rear connection. Terminals designed for DC current. Mounting Fixed mounting (panel or DIN rail adapter). Width (3P) Approximately 105 mm (for fixed version with TM-D unit) or 158 mm (for electronic version). Ambient Temperature -25°C to +70°C (special versions for wider ranges available). Accessories Auxiliary contacts, shunt trip, undervoltage release, motor operator – all rated for DC operation.