CHNT NXM-125S/4300B 4P 125A MCCB modular case circuit breaker shown in a technical product graphic with multicolored terminal wires and a dark blue information banner at the bottom.
Technical product diagram of a CHNT NMX 125A 4300B 4P MCCB circuit breaker, showing the internal structure and working components with labeled callouts and key specifications.
Technical product diagram of a CHNT NMX-125S/4300B 4P 125A MCC contactor, showing front view, internal structure, and labeled detail callouts on a white background.
CHNT NXM-125S/4300B 4P 125A MCCB modular case circuit breaker shown in a technical product graphic with multicolored terminal wires and a dark blue information banner at the bottom.
Technical product diagram of a CHNT NMX 125A 4300B 4P MCCB circuit breaker, showing the internal structure and working components with labeled callouts and key specifications.
Technical product diagram of a CHNT NMX-125S/4300B 4P 125A MCC contactor, showing front view, internal structure, and labeled detail callouts on a white background.

CHINT NXM-125S/4300B 125A 4P MCCB | 25kA

CHINT NXM-125S/4300B 4P 125A MCCB The CHINT NXM-125S/4300B 125A MCCB (Molded Case Circuit Breaker) is a 4-pole...
Vendor: Ch Power Solution
SKU: AR-002548
Availability: Many In Stock
Product type: circuit breaker
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Description
Description
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CHINT NXM-125S/4300B 4P 125A MCCB

The CHINT NXM-125S/4300B 125A MCCB (Molded Case Circuit Breaker) is a 4-pole thermomagnetic circuit breaker designed for low-voltage AC power distribution and electrical protection applications. It provides protection against overload and short-circuit conditions in commercial, industrial and power-distribution systems.

With a 125A rated current, 4-pole configuration and 25kA ultimate short-circuit breaking capacity (Icu), the NXM-125S/4300B is designed for reliable circuit protection where higher current capacity is required. CHINT's NXM series is designed for low-voltage power distribution and complies with IEC/EN 60947-2 requirements. 

Key Features

  • 125A rated current
  • 4-pole configuration
  • 25kA ultimate breaking capacity (Icu)
  • 15kA service short-circuit breaking capacity (Ics)
  • Thermomagnetic protection
  • Fixed regulation
  • Suitable for AC power distribution
  • Designed for overload and short-circuit protection
  • Compact molded-case construction
  • Suitable for commercial and industrial electrical installations
  • Compliant with IEC/EN 60947-2 

4-Pole MCCB for AC Power Distribution

The 4P configuration provides switching and protection across four poles, making the breaker suitable for electrical distribution systems where three-phase circuits and neutral switching are required.

The NXM-125S/4300B is part of CHINT's NXM molded case circuit breaker range, which includes different frame sizes, pole configurations and breaking capacities for power-distribution applications. 

125A Thermomagnetic Circuit Protection

This CHINT MCCB uses a thermomagnetic release for circuit protection against overload and short-circuit conditions. The 125A version belongs to the 125-frame NXM range and uses fixed regulation. 

This makes it suitable for electrical distribution applications where dependable protection of wiring, panels and connected equipment is required.

25kA Breaking Capacity

The NXM-125S/4300B 125A version has an Icu of 25kA and an Ics of 15kA, providing fault-interruption capability for suitable low-voltage distribution applications. 

Applications

The CHINT NXM-125S/4300B can be used in:

  • Three-phase electrical distribution systems
  • Commercial electrical panels
  • Industrial distribution boards
  • Power distribution systems
  • Main and sub-distribution panels
  • Electrical protection panels
  • Commercial buildings
  • Industrial installations
  • High-current AC circuits

Technical Specifications

Specification Details
Brand CHINT
Series NXM
Model NXM-125S/4300B
Product Type Molded Case Circuit Breaker (MCCB)
Rated Current (In) 125A
Number of Poles 4P
Release Type Thermomagnetic
Regulation Fixed
Breaking Capacity (Icu) 25kA
Service Breaking Capacity (Ics) 15kA
Rated Insulation Voltage (Ui) 800V
Rated Impulse Withstand Voltage (Uimp) 8kV
Rated Frequency 50/60Hz
Standard IEC/EN 60947-2
Mounting Type Fixed
Application AC Power Distribution

The 25kA/15kA breaking capacities, 125A rating, 4-pole configuration, thermomagnetic release and fixed regulation are supported by CHINT's NXM documentation. 

Frequently Asked Questions

What is the rating of the CHINT NXM-125S/4300B?

The CHINT NXM-125S/4300B version shown here has a 125A rated current.

Is the CHINT NXM-125S/4300B a 4-pole MCCB?

Yes. The NXM-125S/4300B 125A is a 4-pole (4P) MCCB. 

What is the breaking capacity of the CHINT 125A MCCB?

The NXM-125S/4300B has an Icu of 25kA and Ics of 15kA. 

Is the CHINT NXM-125S/4300B adjustable?

The 125A NXM-125S/4300B is a fixed-regulation thermomagnetic MCCB, so it should not be marketed as an adjustable-trip version. 

What standard does this CHINT MCCB comply with?

The NXM-125S/4300B is specified for IEC/EN 60947-2.

What is the insulation voltage of the NXM-125S/4300B?

The product marking/source information specifies a rated insulation voltage (Ui) of 800V. The product image also shows Ui 800V and Uimp 8kV.

Additional Information
Additional Information
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Brand: CHINT Series: NXM Model: NXM-125S/4300B Product Type: Molded Case Circuit Breaker (MCCB) Rated Current: 125A Number of Poles: 4P Release Type: Thermomagnetic Regulation: Fixed Ultimate Breaking Capacity (Icu): 25kA Service Breaking Capacity (Ics): 15kA Rated Insulation Voltage (Ui): 800V Rated Impulse Withstand Voltage (Uimp): 8kV Rated Frequency: 50/60Hz Standard: IEC/EN 60947-2 Mounting Type: Fixed Application: AC Power Distribution
Shipping & Return
Shipping & Return
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Shipping Orders are shipped according to product availability and the delivery options available at checkout. Returns & Exchanges Return or exchange requests are handled according to CH Power Solutions' return policy. Products must meet the applicable return conditions. Damaged or Incorrect Product If you receive a damaged, defective, or incorrect product, please contact CH Power Solutions with your order details so the issue can be reviewed.
Custom Tab
Custom Tab
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Applications & Installation The CHINT NXM-125S/4300B 4P 125A MCCB is suitable for AC electrical distribution and circuit-protection applications in commercial, industrial and other low-voltage power-distribution systems. Suitable Applications: - Three-phase power distribution - Commercial distribution panels - Industrial electrical panels - Main distribution boards - Sub-distribution boards - Electrical protection systems - High-current AC circuits Protection: - Overload protection - Short-circuit protection Configuration: - 4 Pole - 125A - Thermomagnetic - Fixed regulation - 25kA Icu CHINT identifies the NXM series for overload, short-circuit and low-voltage power-distribution protection applications.

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