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Chint NXB-63 Miniature Circuit Breaker

Manufacturer: CHINT
Model: NXB‑63 Miniature Circuit Breaker
Rated Current Range: 1–63A
Rated Voltage: 220–415V AC (1P to 4P)
Trip Characteristic: B, C, D
Breaking Capacity: 6 kA / 10 kA

Product Description

Standard Features

  • Overload Protection: Thermal-magnetic trip mechanism protects circuits from overload conditions

  • Short-Circuit Protection: Rapid magnetic trip ensures fast disconnection during short-circuit events

  • Multiple Trip Curves: Available in B, C, and D curves to match different load characteristics

  • Wide Current Range: Rated current options from 1A to 63A for flexible application

  • Multi-Pole Configuration: Supports 1P, 1P+N, 2P, 3P, 3P+N, and 4P installations

  • Compact Design: DIN rail mounting (TH35‑7.5) for easy integration into distribution boards

  • High Breaking Capacity: 6 kA or 10 kA rated short-circuit breaking capacity for safety

  • Reliable Operation: Mechanical life up to 20,000 cycles and electrical life up to 10,000 cycles

  • Environmental Tolerance: Operates in temperatures from −35°C to +70°C with IP20 protection

Technical Specifications

 

ModelDescriptionCurrent RatingSupply Voltage
NXB-63 B11P, B-curve MCB for residential and light commercial circuits1 – 6 A220–240V AC
NXB-63 B21P, B-curve MCB for small loads6 – 10 A220–240V AC
NXB-63 B101P, B-curve MCB for lighting and general purpose circuits10 – 16 A220–240V AC
NXB-63 C161P/2P, C-curve MCB for motor protection and commercial circuits16 – 25 A220–415V AC
NXB-63 C322P/3P, C-curve MCB for industrial lighting and small motors32 – 40 A220–415V AC
NXB-63 D403P/4P, D-curve MCB for inductive loads and motors40 – 50 A220–415V AC
NXB-63 D633P/4P, D-curve MCB for larger motor circuits and heavy loads50 – 63 A220–415V AC

 

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