NXM Moulded Case Circuit Breaker

NXM Moulded Case Circuit Breaker

The NXM Moulded Case Circuit Breaker (MCCB) offers reliable protection against overload, short-circuit, and under-voltage in low-voltage power distribution systems. With frame sizes from 63A to 1600A and breaking capacities up to 70kA, it ensures stable operation across commercial, industrial, and motor control applications. Available in fixed or plug-in types, with thermal-magnetic and electronic releases, the NXM series delivers high safety, flexibility, and IEC 60947-2 compliance for modern electrical networks.

Product Information

Application: Protection against overload, short-circuit, and under-voltage; suitable for distribution and motor circuits
Frame Sizes: 63A, 125A, 160A(W125), 250A, 400A, 630A, 800A(W630), 1000A(W800), 1250A, 1600A
Rated Operational Voltage (Ue): 220V / 230V / 240V / 380V / 400V / 415V / 500V / 690V
Rated Insulation Voltage (Ui): Up to 1000V
Breaking Capacity Codes: E (15kA), S (25–36kA), F (36–50kA), H (50–70kA)
Rated Impulse Withstand Voltage (Uimp): 8–12 kV
Utilization Category: Cat A (Thermal Magnetic) / Cat B (Electronic)
Release Types:
- Thermal-magnetic fixed type
- Magnetic fixed type
- Electronic type
Rated Current (In): 16A – 1600A (depending on frame size)
Rated Short-circuit Breaking Capacity (Icu/Ics):
- Up to 70kA at 400V AC
- Up to 50kA at 690V AC
Frequency: 50/60Hz
Number of Poles: 2P, 3P, 4P
Installation Methods: Fixed or Plug-in
Operating Temperature Range: −25°C to +70°C
Altitude Limit: ≤2000m (with derating above)
Protection Grade: IP30 (excluding terminals)
Environmental Durability: Tested for dry heat, salt mist, and humidity, compliant with IEC 60068
Standard Compliance: IEC/EN 60947-1, IEC/EN 60947-2, IEC/EN 60947-3
Accessories Available:
- Auxiliary & Alarm Contacts
- Motor-driven Mechanism
- Shunt & Undervoltage Release
- Interphase Barriers
- Plug-in Base and Handheld Test Module

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NXM-MCCB-Catalog.pdf

21.35MB

2025-04-29

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2104-NXM-MCCB-Manual-2.pdf

2.94MB

2025-03-27

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2104-NXM-MCCB-Manual-1.pdf

2.55MB

2025-03-27

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2406-NXM-160-MCCB-CB Certificate.pdf

974.84KB

2025-03-27

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2406-NXM-1000-MCCB-CE Certificate.pdf

1.19MB

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2406-NXM-1250-MCCB-CE Certificate.pdf

1.17MB

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2406-NXM-1600-MCCB-CB Certificate.pdf

971.37KB

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2406-NXM-800-MCCB-CE Certificate.pdf

1.19MB

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2406-NXM-800-MCCB-CB Certificate.pdf

1004.29KB

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2406-NXM-160-MCCB-CE Certificate.pdf

1.17MB

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2406-NXM-1000-MCCB-CB Certificate.pdf

1004.33KB

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2406-NXM-1250-MCCB-CB Certificate.pdf

971.69KB

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2405-NXM-1600-MCCB-CE Certificate.pdf

1.19MB

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2206-NXM-MCCB-EAC Certificate.pdf

1.84MB

2025-03-27

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NXMS-MCCB-Drawing-1000,4P.dwg

761.52KB

2025-03-27

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NXM-MCCB-Drawing-160S,3P.stp

6.32MB

2025-03-27

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NXM-MCCB-Drawing-630,400,4P-1.stp

9.99MB

2025-03-27

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NXMLE-MCCB-Drawing-630,400,3P.dwg

749.62KB

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NXM-MCCB-Drawing-125(63)S,2P.stp

9.38MB

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NXMLE-MCCB-Drawing-800,4P.stp

9.44MB

2025-03-27

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NXM-MCCB-Drawing-125(63).dwg

2.69MB

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NXM-MCCB-Drawing-250H,3P.stp

11.09MB

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NXMLE-MCCB-Drawing-125H,4P.stp

9.49MB

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NXMLE-MCCB-Drawing-800,3P.stp

7.83MB

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NXM-MCCB-Drawing-630,400,4P.dwg

727.75KB

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NXMS-MCCB-Drawing-160H,3P.dwg

1.34MB

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NXM-MCCB-Drawing-160H,3P.stp

6.92MB

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NXM-MCCB-Drawing-630,400,3P.dwg

724.15KB

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NXMS-MCCB-Drawing-630,400,3P.dwg

741.16KB

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NXM-MCCB-Drawing-1250,4P.stp

10.37MB

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NXM-MCCB-Drawing-1000,4P.stp

13.73MB

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NXMS-MCCB-Drawing-1000,3P.dwg

735.88KB

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NXM-MCCB-Drawing-1000,4P.dwg

579.78KB

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NXM-MCCB-Drawing-1600,3P-2.stp

14.41MB

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NXMLE-MCCB-Drawing-160S,4P.stp

8.28MB

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NXM,NXMS-MCCB-Drawing-1600.dwg

1.69MB

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NXMS-MCCB-Drawing-160H,4P.stp

16.62MB

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NXMLE-MCCB-Drawing-630,400,3P.stp

11.05MB

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NXM-MCCB-Drawing-1600,3P-3.stp

15.26MB

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NXMLE-MCCB-Drawing-250S,2P.stp

7.38MB

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NXMS-MCCB-Drawing-1250,4P.stp

9.56MB

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NXM-MCCB-Drawing-160S,2P.stp

4.7MB

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NXMLE-MCCB-Drawing-800,3P.dwg

598.66KB

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NXM-MCCB-Drawing-800,3P.dwg

547.05KB

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NXMS-MCCB-Drawing-1250,3P.x_t

26.39MB

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NXMS-MCCB-Drawing-630,400,3P.stp

12.21MB

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NXMS-MCCB-Drawing-1000,3P.stp

5.93MB

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NXM-MCCB-Drawing-1600,4P.stp

18.87MB

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NXMLE-MCCB-Drawing-125(63).dwg

2.45MB

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NXM-MCCB-Drawing-250S,4P-1.stp

12.66MB

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NXM-MCCB-Drawing-250S,3P.stp

15.87MB

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NXMLE-MCCB-Drawing-250S,4P.stp

13.38MB

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NXM-MCCB-Drawing-250H,4P.stp

16.16MB

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NXM-MCCB-Drawing-160S,4P.stp

8.1MB

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NXM-MCCB-Drawing-630,400,3P-1.stp

7.41MB

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NXMS-MCCB-Drawing-1600,3P.dwg

587.8KB

2025-03-27

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NXMS-MCCB-Drawing-160H,3P.stp

14.47MB

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NXM-MCCB-Drawing-250S,2P.stp

8.48MB

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NXMLE-MCCB-Drawing-125H,3P.stp

7.74MB

2025-03-27

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NXM-MCCB-Drawing-125(63)S,4P.stp

16.06MB

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NXMLE-MCCB-Drawing-160H,3P.stp

6.78MB

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NXMLE-MCCB-Drawing-800,4P.dwg

602.9KB

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NXMLE-MCCB-Drawing-250H,3P.stp

10.95MB

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NXM-MCCB-Drawing-800,4P.stp

13.39MB

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NXMLE-MCCB-Drawing-250.dwg

1.89MB

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NXM-MCCB-Drawing-250S,4P-2.stp

12.66MB

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NXMLE-MCCB-Drawing-160S,3P.stp

6.17MB

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NXMS-MCCB-Drawing-630,400,4P.stp

12.19MB

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NXM-MCCB-Drawing-1600,3P-1.stp

14.4MB

2025-03-27

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NXMS-MCCB-Drawing-160H,4P.dwg

1.33MB

2025-03-27

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NXMLE-MCCB-Drawing-160H,4P.stp

8.36MB

2025-03-27

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NXM-MCCB-Drawing-630,400,3P-2.stp

7.41MB

2025-03-27

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NXMS-MCCB-Drawing-630,400,4P.dwg

755KB

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NXMLE-MCCB-Drawing-160S,2P.stp

2.78MB

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NXM-MCCB-Drawing-1000,3P.dwg

578.31KB

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NXM-MCCB-Drawing-800,4P.dwg

562.05KB

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NXM-MCCB-Drawing-250.dwg

727.48KB

2025-03-27

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NXM-MCCB-Drawing-160H,4P.stp

8.37MB

2025-03-27

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NXMLE-MCCB-Drawing-630,400,4P.stp

12.73MB

2025-03-27

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NXM-MCCB-Drawing-1250,3P.stp

15.64MB

2025-03-27

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NXMS-MCCB-Drawing-1600,4P.stp

9.71MB

2025-03-27

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NXMS-MCCB-Drawing-250,4P.stp

15.37MB

2025-03-27

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NXM,NXMLE-MCCB-Drawing-160S,H.dwg

1.72MB

2025-03-27

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NXM-MCCB-Drawing-630,400,4P-3.stp

9.99MB

2025-03-27

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NXM-MCCB-Drawing-630,400,4P-2.stp

9.99MB

2025-03-27

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NXMS-MCCB-Drawing-250.dwg

411.19KB

2025-03-27

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NXM-MCCB-Drawing-1000,3P.stp

34.69MB

2025-03-27

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NXMLE-MCCB-Drawing-630,400,4P.dwg

752.84KB

2025-03-27

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NXMS-MCCB-Drawing-250,3P.stp

17.09MB

2025-03-27

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NXM-MCCB-Drawing-125(63)S,3P.stp

12.79MB

2025-03-27

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NXHM-MCCB-Drawing-125(63).dwg

5.32MB

2025-03-27

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NXMS-MCCB-Drawing-1000,4P.stp

8.21MB

2025-03-27

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NXM-MCCB-Drawing-800,3P.stp

14.93MB

2025-03-27

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FAQs

What applications is the NXM MCCB best suited for?

The NXM series is ideal for low-voltage power distribution and motor protection systems in industrial plants, commercial buildings, and power networks requiring reliable overload and short-circuit protection.

What’s the difference between thermal-magnetic and electronic release versions?

The thermal-magnetic type provides standard overload and short-circuit protection, while the electronic type allows adjustable settings for long, short, and instantaneous tripping—ideal for precision control in large installations.

Can it operate under harsh environmental conditions?

Yes. The NXM MCCB has undergone humidity, heat, salt mist, and vibration tests, ensuring reliable performance in demanding industrial and outdoor environments.

What accessories can be added to enhance functionality?

Optional accessories include motor-driven mechanisms, under-voltage and shunt releases, auxiliary/alarm contacts, and manual operating modules, offering full adaptability to control panels and automation systems.

How does NXM compare to CHINT’s NM8N series?

The NXM focuses on compact design and flexible mounting for distribution and motor circuits, while NM8N offers higher insulation voltage and extended protection range for high-capacity systems like energy or infrastructure networks.