CHINT NXM-125S/4300 MCCB – 125A, 4P, 36kA Molded Case Circuit Breaker

Product Description:
The CHINT NXM-125S/4300 125A 4-Pole MCCB is a compact, high-performance molded case circuit breaker designed for 3-phase + neutral (4P) protection in low-voltage distribution systems. With a 125A rated current and a breaking capacity of 36kA at 400V, it offers dependable safety and fault isolation for commercial and industrial applications.

This unit features a fixed thermal-magnetic trip unit for reliable protection against overloads and short circuits. The 4-pole configuration ensures complete disconnection of all phases plus neutral, making it ideal for systems requiring balanced and safe power management.

Key Features:

• ✅ Rated Current: 125A

• ✅ 4 Poles (3P + N) – Full disconnection of all conductors

• ✅ Breaking Capacity: 36kA at 400V

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

• ✅ Trip Type: Fixed thermal-magnetic

• ✅ Push-to-Trip Test Button

• ✅ Compact NXM-125 Frame Size – Space-saving panel integration

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

Technical Specifications:

• Model: NXM-125S/4300

• Rated Current (In): 125A

• Poles: 4P (Three-phase + Neutral)

• 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

• Mounting: Fixed, front-connected

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

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

Applications:

• Three-phase systems with neutral

• Industrial control panels

• Commercial lighting & HVAC systems

• UPS and backup generators

• Load distribution boards

• Data center subpanels