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 NB1L Residual Current Operated Circuit Breaker with Over-current Protection (RCBO) is a compact and versatile safety device that combines the functions of a Miniature Circuit Breaker (MCB) and a Residual Current Device (RCD). It provides reliable protection against overload, short-circuit, and earth leakage faults. With uninterrupted neutral poles and multiple sensitivity options, the NB1L is ideal for enhancing electrical safety and compliance in residential and small commercial applications.

Product Information

Compliant Standards and Certifications

IEC/EN 61009-1

Main Specifications

Rated Current (In:) 1A to 40A
Poles: 1P+N (left/right), 2P
Voltage: 220/230/240V
Sensitivity (IΔn): 30/100/300mA
Short-circuit Capacity (Icn): 6kA / 10kA
Break Time: ≤ 0.1s
Frequency: 50/60Hz
Impulse Voltage: 6kV
Electrical Life: 2,000 Operations
Mechanical Life: 20,000 Operations
Protection Degree: IP20
Temperature Range: -25°C to +40°C (Operation), up to +70°C (Storage)

Name

Size

Release time

Operate

NB1L-RCBO-Catalog.pdf

1.05MB

2025-12-09

Download

NB1L-40-RCBO-Catalog.pdf

1.03MB

2025-12-09

Download

Name

Size

Release time

Operate

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

875.41KB

2024-10-18

Download

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

980.31KB

2024-10-18

Download

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

984.07KB

2024-10-18

Download

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

934.2KB

2024-10-18

Download

Name

Size

Release time

Operate

2408-NB1L-RCBO-REACH Declaration Certificate.pdf

393.58KB

2024-10-18

Download

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

110.66KB

2024-10-18

Download

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

322.86KB

2024-10-18

Download

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

2.31MB

2024-10-18

Download

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

334.11KB

2024-10-18

Download

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

976.45KB

2024-10-18

Download

2403-NB1L-RCBO-UA TR Certificate.pdf

3.31MB

2024-10-18

Download

2402-NB1L-RCBO-SIRIM Certificate.pdf

6.88MB

2024-10-18

Download

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

947.05KB

2024-10-18

Download

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

1.23MB

2024-10-18

Download

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

1.08MB

2024-10-18

Download

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

1.65MB

2024-10-18

Download

2309-NB1L-RCBO-CB Certificate.pdf

805.77KB

2024-10-18

Download

2309-NB1L-RCBO-CE Certificate.pdf

730.39KB

2024-10-18

Download

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

649.41KB

2024-10-18

Download

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

593.41KB

2024-10-18

Download

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

586.11KB

2024-10-18

Download

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

687.4KB

2024-10-18

Download

2206-NB1L-RCBO-EAC Certificate.pdf

611.26KB

2024-10-18

Download

2107-NB1L-RCBO-TISI Certificate.pdf

557.91KB

2024-10-18

Download

1811-NB1L-RCBO-Inntertek Certificate.pdf

95.78KB

2024-10-18

Download

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

625.96KB

2024-10-18

Download

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

820.97KB

2024-10-18

Download

1706-NB1L-RCBO-CE Certificate.pdf

820.96KB

2024-10-18

Download

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

539.15KB

2024-10-18

Download

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

724.51KB

2024-10-18

Download

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

2.04MB

2024-10-18

Download

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

636.2KB

2024-10-18

Download

1608-NB1L-RCBO-CE Certificate.pdf

2.25MB

2024-10-18

Download

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

211.83KB

2024-10-18

Download

Name

Size

Release time

Operate

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

9.02MB

2024-09-23

Download

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

2.35MB

2024-09-23

Download

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

94.91KB

2025-03-25

Download

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

Download

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

2025-03-25

Download

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

11.62MB

2024-09-23

Download

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

11.83MB

2024-09-23

Download

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

18.98MB

2024-09-23

Download

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

Download

NB1L（2H）-2D-RCBO-Drawing.dwg

556.74KB

2025-03-25

Download

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

17.03MB

2024-09-23

Download

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

87.27KB

2024-09-23

Download

NB1L（2H）-3D-RCBO-Drawing.stp

8.23MB

2024-09-23

Download

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

2025-03-25

Download

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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.