Chint Circuit Breaker NXB-63S 4P 25A 4.5 kA Curve C 4M 296907

Circuit breaker Chint effective protection for three-phase circuits

The NXB-63S/C25-4P-4.5 circuit breaker is a protection device designed to automatically interrupt the electrical circuit in case of overloads or short circuits, contributing to the safety and operational continuity of the system. Thanks to the 4 poles, it is ideal for three-phase systems with neutral and finds application in both residential and tertiary environments.

Certified reliability according to IEC standards

Manufactured in compliance with IEC/EN 60898-1 standard, this circuit breaker ensures a breaking capacity of 4.5 kA, suitable for protecting terminal distribution in small and medium-sized installations. The limitation class 3 guarantees a high capacity to reduce passing energy, minimizing damage in case of failure.

Intervention curve C balance between sensitivity and selectivity

The circuit breaker is characterized by a curve C, which allows intervention in the presence of overcurrents from 5 to 10 times the nominal current (25 A). This feature makes it ideal for:

• Domestic installations

• Secondary distribution boards

• Applications with moderately inductive loads (small motors, transformers, etc.)
  
  

Quick installation and integration in DIN boards

Thanks to the 4-module format and compact dimensions, the circuit breaker fits perfectly into standard modular electrical panels. The IP20 protection degree ensures good safety against direct contact, making the device suitable for mounting inside protected panels.

Compatibility with functional accessories

The device can be equipped with:

• Auxiliary contacts series AX-X1

• Alarm contacts series AL-X1

• Shunt trip coils series SHT-X1

• Undervoltage coils series UVT-X1
  
  

Not compatible with differential modules, therefore for differential protection it is necessary to use external or dedicated devices.

Recommended applications

Thanks to its configuration and technical characteristics, the NXB-63S/C25-4P circuit breaker is suitable for:

• Three-phase distribution boards

• Civil and commercial installations

• Protection of mixed loads (lighting, sockets, small motors)

• Systems requiring integration with remote trippers
  
  

Technical Characteristics Chint Circuit Breaker