NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

The CHINT NB1L RCBO combines residual current protection and magnetic over-current protection to provide comprehensive electrical safety. Designed for residential, commercial, and industrial applications, it safeguards circuits from overload, short-circuit, and earth leakage faults. With a compact DIN rail-mounted design and Type AC and Type A tripping classes, the NB1L ensures dependable performance in 230 V AC systems. Its 6 kA breaking capacity, fast tripping, and broad current range make it ideal for distribution systems requiring high reliability and user protection.

Product Information

Function: Provides combined protection against earth leakage, overload, and short-circuit faults
Standards Compliance: IEC/EN 61009-1
Tripping Type: Thermo-magnetic release
Leakage Detection Type: Type AC, Type A, and Type A-SI (for C40 only)
Rated Voltage (Ue): 220/230/240 V~
Rated Current (In): 1 A, 2 A, 3 A, 4 A, 6 A, 10 A, 13 A, 16 A, 20 A, 25 A, 32 A, 40 A
Rated Residual Operating Current (IΔn): 0.03 A, 0.1 A, 0.3 A (depending on model)
Rated Residual Making and Breaking Capacity (IΔm): 6,000 A
Rated Short-circuit Capacity (Icn): 6,000 A (6 kA)
Rated Frequency: 50/60 Hz
Rated Impulse Withstand Voltage (Uimp): 4 kV
Insulation Voltage (Ui): 500 V
Dielectric Test Voltage: 2 kV for 1 min
Tripping Curves:
- B Curve (3–5 In): For long cable runs and TN/IT systems
- C Curve (5–10 In): For resistive and inductive loads with low inrush current
Break Time Under IΔn: ≤ 0.1 s
Pollution Degree: 2
Mechanical Life: 20,000 operations
Electrical Life: 2,000–3,000 operations (depending on curve)
Ambient Operating Temperature: –25 °C to +40 °C (average ≤ 35 °C)
Storage Temperature: –25 °C to +70 °C
Protection Degree: IP20
Terminal Connection: Cable, U-type busbar, or pin-type busbar (top/bottom)
Terminal Capacity:
- Cable: up to 25 mm² (AWG 18–3)
- Busbar: up to 10 mm² (AWG 18–8)
Tightening Torque: 2 N·m (≈ 18 in·lbs)
Mounting Method: 35 mm DIN rail, clip-on installation
Connection Direction: From top or bottom
Temperature Derating: Reference temperature 30 °C; derating factor 0.80 at 70 °C
Dimensions (mm):
- 1P+N: 86 × 36 × 77 (H × W × D)
- 2P: 86 × 54 × 78 (H × W × D)

Name

Size

Release time

Operate

NB1L-RCBO-Catalog.pdf

1.05MB

2025-12-09

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NB1L-40-RCBO-Catalog.pdf

1.03MB

2025-12-09

Download

Name

Size

Release time

Operate

2004-NB1L(2)-RCBO-Manual.pdf

875.52KB

2024-10-18

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2004-NB1L(3)-RCBO-Manual.pdf

980.41KB

2024-10-18

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2004-NB1L-40,63-RCBO-Manual.pdf

984.17KB

2024-10-18

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2012-NB1L(2H)-RCBO-Manual.pdf

934.3KB

2024-10-18

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Name

Size

Release time

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2408-NB1L-RCBO-REACH Declaration Certificate.pdf

393.68KB

2024-10-18

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2404-NB1L(2H)-RCBO-CB Certificate.pdf

110.66KB

2024-10-18

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2404-NB1L-40-RCBO-CE Declaration Certificate.pdf

322.96KB

2024-10-18

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2404-NB1L(2H)-RCBO-KEMA Certificate.pdf

2.31MB

2024-10-18

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2404-NB1L-63-RCBO-CE Declaration Certificate.pdf

334.22KB

2024-10-18

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2403-NB1L-63-RCBO-CE Certificate.pdf

1020.89KB

2024-10-18

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2403-NB1L-RCBO-UA TR Certificate.pdf

3.31MB

2024-10-18

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2402-NB1L-RCBO-SIRIM Certificate.pdf

6.88MB

2024-10-18

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2401-NB1L 2P-RCBO-CE Certificate.pdf

991.48KB

2024-10-18

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2401-NB1L 2P-RCBO-SEMKO Certificate.pdf

1.27MB

2024-10-18

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2401-NB1L 2P-RCBO-CB Certificate.pdf

1.13MB

2024-10-18

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2310-NB1L-63-RCBO-TISI Certificate.pdf

1.69MB

2024-10-18

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2309-NB1L-RCBO-CB Certificate.pdf

851.31KB

2024-10-18

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2309-NB1L-RCBO-CE Certificate.pdf

774.58KB

2024-10-18

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2304-NB1L 1PN-RCBO-CB Certificate.pdf

695.1KB

2024-10-18

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2208-NB1L-63-RCBO-SAA Certificate.pdf

593.51KB

2024-10-18

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2207-NB1L-40-RCBO-SAA Certificate.pdf

586.21KB

2024-10-18

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2207-NB1L-40H-RCBO-SAA Certificate.pdf

687.5KB

2024-10-18

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2206-NB1L-RCBO-EAC Certificate.pdf

611.36KB

2024-10-18

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2107-NB1L-RCBO-TISI Certificate.pdf

558.01KB

2024-10-18

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1811-NB1L-RCBO-Inntertek Certificate.pdf

95.78KB

2024-10-18

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1707-NB1L-40(H)-RCBO-FIMKO Certificate.pdf

666.89KB

2024-10-18

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1706-NB1L-40(H)-RCBO-CE Certificate.pdf

821.07KB

2024-10-18

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1706-NB1L-RCBO-CE Certificate.pdf

821.06KB

2024-10-18

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1706-NB1L-63-RCBO-CB Certificate.pdf

539.25KB

2024-10-18

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1706-NB1L-40(H)-RCBO-SEMKO Certificate.pdf

724.61KB

2024-10-18

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1705-NB1L-40(H)-RCBO-CB Certificate.pdf

2.04MB

2024-10-18

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1608-NB1L-63-RCBO-RCC Certificate.pdf

636.31KB

2024-10-18

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1608-NB1L-RCBO-CE Certificate.pdf

2.25MB

2024-10-18

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1606-NB1L-63-RCBO-SEMKO Certificate.pdf

211.93KB

2024-10-18

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Name

Size

Release time

Operate

NB1L-63 1p-n-3D(V1)-RCBO-Drawing.x_t

9.02MB

2024-09-23

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NB1L(2)-2D(V1)-RCBO-Drawing.dwg

2.35MB

2024-09-23

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NB1L(3)-2D(V1)-RCBO-Drawing.dwg

94.91KB

2025-03-25

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NB1L-40 4p-3D(V1)-RCBO-Drawing.x_t

20.37MB

2024-09-23

Download

NB1L-40 1p-n-3D(V1)-RCBO-Drawing.x_t

10.35MB

2024-09-23

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NB1L(2)-3D(V1)-RCBO-Drawing.igs

2025-03-25

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NB1L-40 2p-3D(V1)-RCBO-Drawing.x_t

11.62MB

2024-09-23

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NB1L-63 2p-3D(V1)-RCBO-Drawing.x_t

11.83MB

2024-09-23

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NB1L(3)-3D(V1)-RCBO-Drawing.igs

18.98MB

2024-09-23

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NB1L-40 3p-3D(V1)-RCBO-Drawing.x_t

16.37MB

2024-09-23

Download

NB1L-40-2D(V1)-RCBO-Drawing.dwg

256.44KB

2025-03-25

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NB1L（2H）-2D-RCBO-Drawing.dwg

556.74KB

2025-03-25

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NB1L-40 3p-n-3D(V1)-RCBO-Drawing.x_t

17.03MB

2024-09-23

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NB1L(2H)-2D(V1)-RCBO-Drawing.dwg

87.27KB

2024-09-23

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NB1L（2H）-3D-RCBO-Drawing.stp

8.23MB

2024-09-23

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NB1L(2H)-3D(V1)-RCBO-Drawing.igs

2025-03-25

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FAQs

What does the NB1L RCBO protect against?

It provides complete protection against earth leakage, overload, and short-circuit conditions, ensuring both electrical safety and fire prevention.

What is the difference between Type A and Type AC models?

Type AC: Detects sinusoidal AC residual currents.

Type A: Detects both AC and pulsating DC residual currents, offering wider protection for electronic loads.

In what kind of applications can the NB1L be used?

It is suitable for residential and light commercial circuits, particularly those using mixed loads such as lighting, sockets, and small motors.

How does ambient temperature affect performance?

The circuit breaker’s rated current is temperature-compensated; above 30 °C, current capacity gradually decreases — e.g., 0.95 at 40 °C, 0.85 at 60 °C.

Can it be installed in both directions?

Yes. The NB1L supports top and bottom wiring, and can be mounted on standard DIN rails using a fast clip-on mechanism for easy installation.