NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

NB4LE Residual Current Operated Circuit Breaker (Electronic)

The NB4LE Residual Current Operated Circuit Breaker (Electronic) delivers advanced residual current, overload, and short-circuit protection in one compact design. Engineered to meet IEC/EN 61009-1 standards, it ensures high reliability and user safety in residential and commercial circuits. With rated currents up to 40A, sensitivity levels of 30mA and 100mA, and Type A or F detection, the NB4LE series offers fast fault response and enhanced immunity to nuisance tripping, ensuring continuous power and dependable performance.

Product Information

Standard Compliance: IEC/EN 61009-1
Rated Current (In): 6A, 10A, 13A, 16A, 20A, 25A, 32A, 40A
Rated Voltage (Ue): 230/240V AC
Rated Residual Operating Current (IΔn): 30mA or 100mA
Type of RCD:
- Type A – Detects AC and pulsating DC residual currents
- Type F – Detects mixed frequencies, resistant to DC up to 10mA, reduced nuisance tripping
Tripping Curves:
- B Curve: Resistive or long cable protection (3–5In)
- C Curve: Inductive/resistive loads (5–10In)
- BK/CK Curves: Enhanced protection with precise thermal-magnetic operation
Rated Short-circuit Breaking Capacity (Icn): 10kA
Rated Residual Making and Breaking Capacity (IΔm): 3kA
Rated Frequency: 50/60Hz
Dielectric Test Voltage: 2kV for 1 minute
Rated Impulse Withstand Voltage (Uimp): 4kV
Rated Insulation Voltage (Ui): 500V
Poles: 2P
Operating Temperature: −25°C to +70°C
Storage Temperature: −25°C to +70°C
Pollution Degree: 2
Mechanical Life: 10,000 operations
Electrical Life: 4,000 operations
Protection Degree: IP20
Mounting: DIN Rail EN 60715 (35mm)
Connection: Bottom electrical feeding
Terminal Capacity: 18–3 AWG (up to 25mm² cable)
Tightening Torque: 2 N·m (18 in-lbs)
Temperature Derating Reference: 30°C (coefficient: 1.0)
Dimensions (mm):
- Height: 86
- Width: 36
- Depth: 78.1
Certifications: CE, CB

Name

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Release time

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NB4LE-40H-F-RCBO-Catalog.pdf

950.38KB

2025-12-10

Download

NB4LE-40H-RCBO-Catalog.pdf

770.27KB

2025-12-10

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Name

Size

Release time

Operate

2206-NB4LE-RCBO-Manual.pdf

999.6KB

2024-09-23

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Name

Size

Release time

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2104-NB4LE-RCBO- CE Declaration Certificate.pdf

1.33MB

2024-09-23

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2009-NB4LE-RCBO-CE Certificate.pdf

2.24MB

2024-09-23

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2009-NB4LE-RCBO-KEMA Certificate.pdf

2.25MB

2024-09-23

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2008-NB4LE-RCBO-CB Certificate.pdf

143.82KB

2024-09-23

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FAQs

What is the function of the NB4LE Residual Current Operated Circuit Breaker?

It protects people and electrical equipment by detecting and interrupting residual currents that may result from insulation failures, while also providing overload and short-circuit protection.

What types of electrical systems can the NB4LE be used in?

It’s suitable for TN and IT systems, handling both resistive and inductive loads such as lighting, HVAC, and industrial control circuits.

How does the Type F RCD version differ from Type A?

Type F offers enhanced protection by detecting mixed-frequency and DC residual currents up to 10mA, reducing nuisance tripping and ensuring better protection in circuits with electronic loads.

What is the rated short-circuit capacity?

The NB4LE has a 10kA breaking capacity, ensuring safe disconnection during fault conditions.

Can the NB4LE be used in high-temperature environments?

Yes — it operates reliably between −25°C and +70°C and includes temperature compensation for rated current to maintain performance under varying conditions.