CHINT NB1-63 Miniature Circuit Breaker 2P 4P Overload Protection Short Circuit Protection in Pakistan

CHINT NB1-63 Miniature Circuit Breaker 2P 4P Overload Protection Short Circuit Protection in Pakistan

The CHINT NB1-63 Miniature Circuit Breaker is designed for reliable overload and short-circuit protection in low-voltage electrical installations. Compact and durable, it operates in AC 50/60 Hz, 230/400 V circuits, with rated currents up to 63 A and a breaking capacity of 6 kA. Its B, C, and D tripping curves accommodate different load types, while a long mechanical life ensures consistent performance in residential, commercial, and light industrial environments.

• Standards Compliance: IEC/EN 60898-1

• Function: Overload, short-circuit, and isolation protection

• Rated Voltage (Ue):

  • 230 V~ for 1P

  • 400 V~ for 2P, 3P, 4P

• Rated Frequency: 50/60 Hz

• Rated Current (In): 6, 10, 13, 16, 20, 25, 32, 40, 50, 63 A

• Rated Breaking Capacity (Icn): 6 kA

• Rated Short-circuit Service Capacity (Ics): 6 kA

• Rated Insulation Voltage (Ui): 500 V

• Rated Impulse Withstand Voltage (Uimp): 4,000 V (1.2/50 μs)

• Tripping Characteristics:

  • B Curve: 3–5 In (resistive loads, lighting)

  • C Curve: 5–10 In (mixed loads, motor circuits)

  • D Curve: 10–14 In (high inrush loads, transformers)