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XT3N250 TMD250/2500 FF 3P

The ABB XT3N250 TMD250/2500 FF 3P is a 3‑pole molded‑case circuit breaker (MCCB) from ABB’s SACE Tmax XT series. It provides protection for industrial and commercial power distribution systems against overloads and short circuits. The breaker features a thermal‑magnetic (TMD) trip unit with an adjustable protection range, suitable for switchboards, motor feeds, and control panels. It is designed for fixed mounting with front terminals.

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Key Specifications General Product Type: Molded Case Circuit Breaker (MCCB) Series: ABB SACE Tmax XT Poles: 3 Frame/Model: XT3N250 TMD250/2500 FF Rated Current: 250 A Trip Unit: Thermal‑magnetic (TMD), adjustable 175–250 A Voltage & Frequency Rated Operational Voltage (AC): 690 V AC Rated Operational Voltage (DC): Up to 500 V DC Rated Frequency: 50/60 Hz Electrical Ratings Rated Insulation Voltage (Ui): 800 V Rated Impulse Withstand Voltage (Uimp): 8 kV Rated Instantaneous Short‑Circuit Setting (Ii): 2500 A Rated Uninterrupted Current (Iu): 250 A Breaking Capacity Ultimate Breaking Capacity (Icu): ~50 kA at 220–240 V AC ~36 kA at 380–415 V AC DC Breaking Capacity (poles in series): ~36 kA @ 250 V DC ~50 kA @ 500 V DC Mechanical & Durability Power Loss: ~17.8 W per pole Electrical Durability: ~8 000 operations Mechanical Durability: ~25 000 operations Protection Class: IP20 Construction & Installation Fixed mounting with front (FF) terminals Suitable for industrial power distribution panels Standards & Safety Complies with IEC 60947‑2 CE and RoHS compliant