描述
High-Quality Aftermarket Alternative | 15A-60A | 5kA | 380/440V | Plug-and-Play Installation
Our NF50-CS Series Molded Case Circuit Breaker (MCCB) is a high-quality, direct replacement for the IEK NF50-CS and Mitsubishi NF-CS series. Specifically designed as a drop-in substitute, it offers identical form, fit, function, and electrical performance—at a more competitive price point. Engineered for reliable circuit protection in industrial and commercial applications, it safeguards your electrical systems from overload and short-circuit damage.
KEY FEATURES & BENEFITS
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Perfect Direct Replacement: Fully interchangeable with IEK NF50-CS and Mitsubishi NF-CS models. Same dimensions, mounting, and electrical ratings for effortless installation—no rewiring or panel modifications required.
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Superior Protection Performance:
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Thermal-Magnetic Trip: Combines precise overload (thermal) protection and instantaneous short-circuit (magnetic) protection.
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High Breaking Capacity: 5kA at 380/440V~, safely interrupts fault currents.
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Voltage Rating: 380/440V AC, suitable for main and sub-circuit distribution.
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Robust & Durable Design:
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Compact, rugged molded case for long service life.
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Clear ON/OFF indicator with visible position.
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Standard DIN-rail and surface mounting compatibility.
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Wide Current Range (2-Pole): Available ratings: 15A, 20A, 30A, 40A, 50A, 60A.
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Certified Quality: Manufactured under strict quality control, compliant with IEC 60947-2 and GB 14048.2 standards.
TECHNICAL SPECIFICATIONS
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Parameter
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Specification
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|---|---|
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Model
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NF50-CS (Replaces IEK NF50-CS / Mitsubishi NF-CS)
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Type
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Molded Case Circuit Breaker (MCCB)
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Poles
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2 Pole (2P)
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Rated Current (In)
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15A, 20A, 30A, 40A, 50A, 60A
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Rated Voltage (Ue)
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380V / 440V AC (50/60Hz)
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Insulation Voltage (Ui)
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440V AC
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Short-Circuit Breaking Capacity (Icu)
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5 kA @ 380/440V~
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Operating Class
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Utilization Category A
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Trip Type
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Thermal-Magnetic (Fixed)
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Instantaneous Trip
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10 x In (±20%)
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Mounting
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DIN Rail & Surface Mount
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Standards
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IEC 60947-2, GB 14048.2
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APPLICATIONS
Ideal for use as a direct replacement in:
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Industrial Control Panels & Distribution Boards
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New & Existing Electrical Installations
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Lighting & Power Circuits
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Small Motors, Pumps, and HVAC Systems
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Commercial & Residential Main Breakers
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OEM Equipment
WHY CHOOSE OUR REPLACEMENT?
✅ Cost Savings: High-quality alternative to original brands, reducing your BOM cost. ✅ Minimal Downtime: True plug-and-play replacement for quick repairs. ✅ Reliable Quality: Manufactured to meet/exceed original specifications. ✅ Full Range: Complete stock covering all 15A-60A ratings.
Note: This is a high-quality aftermarket replacement. It is not manufactured by, nor affiliated with, IEK or Mitsubishi Electri










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