Product Description:
The CHINT NXM-400S/4300 400A MCCB is a high-capacity, industrial-grade molded case circuit breaker designed for robust electrical protection in large-scale distribution networks. Engineered to handle demanding loads, it features a breaking capacity of up to 50kA at 230–240V and 36kA at 400/415V, making it ideal for critical infrastructure, manufacturing, and commercial installations.

This 3-pole MCCB includes a fixed thermal-magnetic trip unit for precise protection against short circuits and overloads, with compliance to IEC/EN 60947-2 standards. Its durable chassis and compact NXM400 frame make it suitable for space-sensitive panels while ensuring maximum safety and performance.

Key Features:

• ✅ Rated Current: 400A

• ✅ Breaking Capacity: Up to 50kA at 240V / 36kA at 400–415V

• ✅ Voltage Rating: 800V AC insulation voltage (Ui)

• ✅ Trip Type: Fixed thermal-magnetic protection

• ✅ Pole Configuration: 3P (3-pole)

• ✅ Manual Push-to-Trip Test Button

• ✅ Certified by CE, KEMA, EAC

• ✅ Compact NXM-400 frame size for space efficiency

Technical Specifications:

• Model: NXM-400S/4300

• Rated Current (In): 400A

• Rated Insulation Voltage (Ui): 800V

• Rated Impulse Voltage (Uimp): 8kV

• Rated Operating Voltage (Ue):

  • 230V: 50kA

  • 240V: 50kA

  • 400V: 36kA

  • 415V: 36kA

• Breaking Capacity (Icu/Ics):

  • 230–240V: 50kA / 30kA

  • 400–415V: 36kA / 20kA

• Frequency: 50/60Hz

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

• Mounting: Fixed type (front-connected)

• Standard Compliance: IEC/EN 60947-2

Applications:

• Main distribution boards

• Industrial plants and machinery

• Generators and UPS systems

• High-load HVAC systems

• Commercial electrical panels

• Power centers in factories and facilities