NBH8 Miniature Circuit Breaker

NBH8 Miniature Circuit Breaker

NBH8 Miniature Circuit Breaker

NBH8 Miniature Circuit Breaker

NBH8 Miniature Circuit Breaker

NBH8 Miniature Circuit Breaker

NBH8 Miniature Circuit Breaker

NBH8 Miniature Circuit Breaker

The NBH8 Miniature Circuit Breaker (MCB) is engineered to protect electrical circuits against overload and short-circuit currents while ensuring safe isolation and switching. Designed for residential and commercial power distribution, it features B and C tripping curves, supports 230/240V AC systems, and offers breaking capacities of 4.5kA or 6kA. Compact, reliable, and fully compliant with IEC/EN 60898-1, the NBH8 guarantees long mechanical endurance and stable protection performance.

Product Information

Function: Circuit protection from overload and short-circuit faults; suitable for isolation and switching
Standard Compliance: IEC/EN 60898-1
Rated Current (In): 1A, 2A, 3A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A
Rated Voltage (Ue): 230/240V AC
Rated Insulation Voltage (Ui): 500V
Rated Frequency: 50/60Hz
Rated Breaking Capacity (Icu): 4.5kA or 6kA
Rated Impulse Withstand Voltage (Uimp): 4kV
Dielectric Strength: 2500V for 1 minute
Tripping Curves:
- B curve (3–5 In) for resistive loads and long cables
- C curve (5–10 In) for inductive loads and low inrush current circuits
Energy Limiting Class: 3
Mechanical Life: 20,000 operations
Electrical Life: 10,000 operations
Number of Poles: 1P+N
Contact Position Indicator: Yes
Protection Degree: IP20
Ambient Operating Temperature: −5°C to +40°C (average ≤35°C)
Storage Temperature: −25°C to +70°C
Terminal Connection Type: Cable or pin-type busbar
Terminal Size:
- Cable: 16mm²
- Busbar: 10mm²
Tightening Torque: 2.0 N·m (18 in·lbs)
Mounting: 35mm DIN rail (EN 60715) with fast clip device
Connection: From top or bottom
Auxiliary Accessories:
- Auxiliary contact
- Shunt release
- Under-voltage release
- Alarm contact
Temperature Derating: Reference temperature 30°C; includes correction factors for ambient range −25°C to +70°C
Dimensions (mm): 44(W) × 86(H) × 60.7(D)
Weight: Approx. 120g

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NBH8-MCB-catalog.pdf

437.13KB

2025-07-21

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NBH8-MCB-Catalog.pdf

442.79KB

2025-12-09

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2003-NBH8-MCB-Manual EN.pdf

200.29KB

2024-09-22

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2408-NBH8-40 40H-MCB-REACH Declaration Certificate.pdf

364.61KB

2024-09-22

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2403-NBH8-MCB-UA TR Certificate.pdf

4.12MB

2024-09-22

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2307-NBH8-40(H)-MCB-AENOR Certificate.pdf

967.83KB

2024-09-22

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2211-NBH8-40-MCB-VDE Certificate.pdf

325.01KB

2024-09-22

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2206-NBH8-MCB-EAC Certificate.pdf

618.13KB

2024-09-22

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2202-NBH8-MCB-RCC Certificate.pdf

1.88MB

2024-09-22

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2201-NBH8-40H-MCB-CE Declaration Certificate.pdf

794.13KB

2024-09-22

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2104-NBH8-40(H)-MCB-UKCA Certificate.pdf

482.51KB

2024-09-22

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2101-NBH8-40(H)-MCB-KEMA Certificate.pdf

2.39MB

2024-09-22

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2008-NBH8-MCB-CE Certificate.pdf

517.72KB

2024-09-22

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2008-NBH8-40(H)-MCB-SEMKO Certificate.pdf

651.53KB

2024-09-22

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2008-NBH8-MCB-ETLeu Certificate.pdf

981.24KB

2024-09-22

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2008-NBH8-MCB-CB Certificate.pdf

448.96KB

2024-09-22

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2001-NBH8-40-MCB-SAA Certificate.pdf

138.61KB

2024-09-22

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0908-NBH8-40 16A-MCB-KC Certificate.pdf

690.18KB

2024-09-22

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0908-NBH8-40 10A-MCB-KC Certificate.pdf

694.01KB

2024-09-22

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NBH8-40-2D(V1)-MCB-Drawing.dwg

2024-09-22

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NBH8-40-3D(V1)-MCB-Drawing.igs

9.57MB

2024-09-22

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FAQs

What is the NBH8 Miniature Circuit Breaker used for?

The NBH8 MCB protects electrical circuits from overload and short-circuit conditions, ensuring operational safety in residential, commercial, and small industrial applications.

What is the difference between B and C tripping curves?

B Curve: Protects resistive loads and long cable runs with low inrush current.

C Curve: Ideal for circuits with mixed or inductive loads such as lighting or motors.

What are the breaking capacity options available?

The NBH8 is available in 4.5kA and 6kA breaking capacity options, offering flexibility for various fault level requirements.

How long can the NBH8 MCB last?

The breaker is designed for 10,000 electrical and 20,000 mechanical operations, ensuring a long service life with consistent performance.

Can the NBH8 MCB integrate with auxiliary devices?

Yes. It supports auxiliary contacts, shunt releases, under-voltage releases, and alarm contacts, enhancing control and monitoring functions.