Eaton NZMN3-AE250-NA / 269299 Molded Case Circuit Breaker, 250A, 3-Pole, Electronic Trip
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The Eaton NZMN3-AE250-NA, manufacturer Article no. 269299, is a three-pole molded case circuit breaker (MCCB) from the NZM3 frame family, designed for system, cable, feeder, and branch circuit protection. Rated at 250A, this fixed-installation circuit breaker features an electronic trip unit with adjustable overload protection from 125A to 250A and instantaneous short-circuit protection adjustable from 2 to 11 times the rated current. The electronic release incorporates RMS current measurement and thermal memory for overload protection. The device features front screw connections, a standard toggle lever, and compatibility with optional motor operators.
| Manufacturer | Eaton |
| Part no. | NZMN3-AE250-NA |
| Article no. | 269299 |
| Product Series / Frame | NZM Series / NZM3 Frame |
| Product Type | Molded Case Circuit Breaker (MCCB) |
| Protective Function | System and Cable Protection |
| Number of Poles | 3-Pole |
| Rated Uninterrupted Current (In/Iu) | 250 A |
| Release System | Electronic Trip Unit with RMS Measurement and Thermal Memory |
| Overload Trip Setting (Ir) | 125–250 A |
| Instantaneous Short-Circuit Setting (Ii) | 2–11 × In (500–2750 A) |
| Rated Operational Voltage (IEC) | 690 V AC |
| Maximum Voltage Rating (UL/CSA) | 600 V AC |
| Ultimate Breaking Capacity (IEC Icu) | 85 kA at 240 V AC; 50 kA at 400/415 V AC; 35 kA at 440 V AC; 25 kA at 525 V AC; 20 kA at 690 V AC |
| Service Breaking Capacity (IEC Ics) | 50 kA at 400/415 V AC; 35 kA at 440 V AC; 13 kA at 525 V AC; 5 kA at 690 V AC |
| Short-Circuit Current Rating (UL/CSA) | 85 kA at 240 V AC; 42 kA at 480 V AC; 35 kA at 600 V AC (60 Hz) |
| Rated Short-Time Withstand Current (Icw) | 3.3 kA at 0.3 s and 1 s |
| Rated Insulation Voltage (Ui) | 1000 V |
| Rated Impulse Withstand Voltage (Uimp) | 8 kV (Main Contacts) |
| Utilization Category | Category A (IEC/EN 60947-2) |
| Installation Type | Fixed Installation |
| Main Circuit Connection | Front Screw Connection |
| Operating Mechanism | Toggle Lever; Optional Motor Operator |
| Ingress Protection | IP20 (Circuit Breaker) |
| Operating Temperature | -25°C to +70°C |
| Storage Temperature | -40°C to +80°C |
| Mechanical Endurance | 15,000 Operations |
| Dimensions (W × H × D) | Approximately 140 × 275 × 166 mm (Manufacturer Dimensional Drawing) |
| Weight | 6.34 kg |
| Applicable Standards | UL 489; CSA C22.2 No. 5-09; IEC 60947-2 |
| North American Certifications | UL Listed (File E31593); CSA Certified (File 022086) |
Typical Applications: The Eaton NZMN3-AE250-NA is suitable for industrial and commercial electrical distribution systems requiring adjustable circuit protection. Manufacturer-specified applications include feeder circuits, branch circuits, and system and cable protection. Its electronic trip system allows overload and instantaneous short-circuit settings to be configured according to equipment requirements and protection coordination studies.
B2B Sourcing & Replacement Support: Apexon Supply provides industrial sourcing and replacement procurement assistance for the Eaton NZMN3-AE250-NA molded case circuit breaker and related NZM-series protection equipment. Before ordering, buyers should confirm the NZM3 frame, rated current, electronic trip characteristics, adjustable protection settings, rated voltage, short-circuit breaking capacity, and connection configuration. IEC and UL/CSA electrical ratings must be evaluated according to the applicable installation standards.
Request a Quote: Contact Apexon Supply with Part no. NZMN3-AE250-NA, Article no. 269299, required quantity, and application requirements for B2B quotation, replacement sourcing, or industrial electrical procurement support.
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