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NB1-63 Miniature Circuit Breaker

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

Product Information

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)
Mechanical Life: 20,000 operations
Electrical Life: 4,000 operations
Ambient Operating Temperature: –5 °C to +40 °C
Storage Temperature: –25 °C to +70 °C
Reference Temperature: 30 °C
Temperature Derating Coefficients:
- 0.95 at 40 °C
- 0.90 at 50 °C
- 0.85 at 60 °C
Altitude Limit: ≤ 2000 m
Mounting: TH35-7.5 DIN rail
Connection: Top or bottom feed
Terminal Capacity: 1–25 mm² (cable)
Tightening Torque: 2.0 N·m
Pollution Degree: 2
Protection Degree: IP20
Compatible Accessories:
- AX-5 (auxiliary contact)
- AL-X3 (alarm contact)
- SHT-X3 (shunt release)
- UVT-X3 (undervoltage release)
Dimensions (mm):
- Height: 82
- Depth: 75.5
- Width: 18 mm per pole

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NB1-63-MCB-Catalog.pdf

893.09KB

2025-02-19

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2004-NB1-63-MCB-Manual UL1077 EN.pdf

224.89KB

2024-09-22

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2004-NB1-63-MCB-Manual IEC 60898-1 EN.pdf

263.62KB

2024-09-22

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2007-NB1-63-MCB-Manual IEC60947-2 EN.pdf

291.42KB

2024-09-22

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2408-NB1-63 63H 63DC-MCB-REACH Declaration Certificate.pdf

363.44KB

2024-09-22

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2405-NB1-63 63H-MCB-TSE Certificate EN60898-1.pdf

1.8MB

2024-09-22

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2404-NB1-63-MCB-InA LOA Certificate IEC60947-2.pdf

52.17KB

2024-09-22

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2404-NB1-63-MCB-InA_ LOA Certificate.pdf

52.39KB

2024-09-22

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2403-NB1-63-MCB-UA TR Certificate.pdf

4.12MB

2024-09-22

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2402-NB1-63-MCB-SIRIM Certificate.pdf

1.28MB

2024-09-22

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2401-NB1-63-MCB-SII Certificate.pdf

790.61KB

2024-09-22

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2312-NB1-63 63H-MCB-DNV Certificate IEC60947-2.pdf

527.67KB

2024-09-22

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2311-NB1-63-MCB-Carbon Footprint Certificate.pdf

541.3KB

2024-09-22

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2311-NB1-63 63H-MCB-CB Certificate IEC60898-1.pdf

1004.66KB

2024-09-22

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2311-NB1-63 63H-MCB-SEMKO Certificate EN60898-1.pdf

1.16MB

2024-09-22

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2311-NB1-63-MCB-SAA Certificate.pdf

1.07MB

2025-03-04

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2305-NB1-63-MCB-TüV Certificate.pdf

2.21MB

2024-09-22

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2305-NB1-63-MCB-SLS Certificate.pdf

3.16MB

2024-09-22

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2304-NB1-63 4P C16-MCB-KC Certificate.pdf

903.49KB

2024-09-22

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2303-NB1-63-SEMKO-MCB-Certificate-4.pdf

415.93KB

2024-09-22

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2301-NB1-63 63H-MCB-UKCA Certificate EN60898-1.pdf

575.66KB

2024-09-22

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2211-NB1-63-MCB-INMETRO Certificate.pdf

1.4MB

2024-09-22

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2207-NB1-63-MCB-CE Certificate EN60947-2.pdf

520.76KB

2024-09-22

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2207-NB1-63-MCB-CB Certificate IEC60947-2.pdf

470.48KB

2024-09-22

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2206-NB1-63-MCB-EAC Certificate.pdf

618.55KB

2024-09-22

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2206-NB1-63-MCB-IMQ Certificate.pdf

896.13KB

2024-09-22

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2201-NB1-63 63H-MCB-InA LOA Certificate IEC60947-2.pdf

376.36KB

2024-09-22

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2201-NB1-63 63H-MCB-CE RoHS Declaration Certificate EN60898-1.pdf

929.52KB

2024-09-22

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2201-NB1-63 63H-MCB-CE RoHS Declaration Certificate EN60947-2.pdf

851.33KB

2024-09-22

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2106-NB1-63H-MCB-CE Certificate EN60947-2.pdf

509.62KB

2024-09-22

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2104-NB1-63,NB1-63H-MCB-UL Certificate.pdf

218.49KB

2024-09-22

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2007-NB1-63-MCB-CE Certificate EN60898-1 AC DC.pdf

514.36KB

2024-09-22

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2007-NB1-63-MCB-CB Certificate IEC60898-1 AC DC.pdf

117.07KB

2024-09-22

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0602-NB1-63-MCB-VDE Certificate.pdf

676.28KB

2024-09-22

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NB1-63-MCB-Drawing-1P-2D.dwg

1.06MB

2024-09-22

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NB1-63-MCB-Drawing-1P-3D.stp

8.06MB

2025-04-07

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NB1-63-MCB-Drawing-1PN-2D.dwg

109.32KB

2025-04-07

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NB1-63-MCB-Drawing-1PN-3D.stp

10.62MB

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NB1-63-MCB-Drawing-2P-2D.dwg

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2024-09-22

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NB1-63-MCB-Drawing-2P-3D.stp

10.62MB

2025-04-07

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NB1-63-MCB-Drawing-3P-2D.dwg

107.69KB

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NB1-63-MCB-Drawing-3P-3D.stp

15.38MB

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NB1-63-MCB-Drawing-3PN-2D.dwg

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NB1-63-MCB-Drawing-3PN-3D.stp

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NB1-63-MCB-Drawing-4P-2D.dwg

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NB1-63-MCB-Drawing-4P-3D.stp

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FAQs

What protection does the NB1-63 MCB provide?

It safeguards circuits against overload and short-circuit conditions, automatically disconnecting faulty circuits to prevent damage and fire risks .

Which tripping curve should I choose for my installation?

B Curve: Suitable for resistive loads like lighting and heating.

C Curve: For mixed loads such as sockets and small motors.

D Curve: Ideal for circuits with high inrush currents like pumps and transformers .

Can the NB1-63 MCB be used for three-phase systems?

Yes. It is available in 1P, 2P, 3P, and 4P versions for both single-phase and three-phase systems up to 400 V .

Is the breaker suitable for harsh environments?

Yes. It operates reliably from –5 °C to +40 °C, with a robust housing rated IP20, and maintains performance up to 2000 m altitude .

What accessories can be installed?

The NB1-63 is compatible with multiple accessories like AX-5 auxiliary contacts, SHT-X3 shunt release, and UVT-X3 undervoltage release, enabling monitoring and remote control .