Product Description:
The CHINT NXM-250S/4300 250A 4-Pole MCCB is a premium molded case circuit breaker built for large-scale three-phase + neutral power distribution. With a rated current of 250A and a short-circuit breaking capacity of 36kA at 400V, this breaker is ideal for industrial switchboards, commercial buildings, data centers, and backup power systems.

The breaker features a fixed thermal-magnetic trip unit that delivers fast and reliable protection against overloads and short circuits. Its 4-pole design ensures total isolation of all conductors, including the neutral, making it suitable for balanced systems that require complete disconnection for safety and maintenance.

Key Features:

• ✅ Rated Current: 250A

• ✅ Poles: 4P (Three-phase + Neutral)

• ✅ Breaking Capacity: 36kA at 400V / 415V

• ✅ Voltage Rating: Up to 800V AC (Ui)

• ✅ Trip Unit: Fixed thermal-magnetic

• ✅ Test Button: Manual push-to-trip test

• ✅ Certifications: IEC/EN 60947-2, CE, KEMA, EAC

• ✅ Durable NXM-250 Frame – For heavy-duty applications

Technical Specifications:

• Model: NXM-250S/4300

• Rated Current (In): 250A

• Poles: 4P

• Rated Insulation Voltage (Ui): 800V

• Rated Impulse Voltage (Uimp): 8kV

• Rated Operating Voltage (Ue):

  • 230V: 50kA

  • 400V: 36kA

  • 415V: 36kA

• Breaking Capacity (Icu/Ics):

  • 230–240V: 50kA / 30kA

  • 400–415V: 36kA / 20kA

• Frequency: 50Hz / 60Hz

• Operating Temperature: -25°C to +70°C

• Mounting Type: Fixed, front-connected

• Trip Unit: Thermal-magnetic (non-adjustable)

Applications:

• Industrial distribution panels

• Main switchboards in factories

• Generator and UPS systems

• HVAC and motor control

• Large commercial and infrastructure projects

• 3-phase systems requiring neutral isolation