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Miniature Circuit Breakers
  • Chint Original NB7 Miniature Circuit Breaker 6A 10A 16A 20A 25A 32A 40A 50A 63A B C D Type 1P 2P 3P 4P 6KA Chint NB7 MCB
  • Chint Original NB7 Miniature Circuit Breaker 6A 10A 16A 20A 25A 32A 40A 50A 63A B C D Type 1P 2P 3P 4P 6KA Chint NB7 MCB
  • Chint Original NB7 Miniature Circuit Breaker 6A 10A 16A 20A 25A 32A 40A 50A 63A B C D Type 1P 2P 3P 4P 6KA Chint NB7 MCB
  • Chint Original NB7 Miniature Circuit Breaker 6A 10A 16A 20A 25A 32A 40A 50A 63A B C D Type 1P 2P 3P 4P 6KA Chint NB7 MCB
  • Chint Original NB7 Miniature Circuit Breaker 6A 10A 16A 20A 25A 32A 40A 50A 63A B C D Type 1P 2P 3P 4P 6KA Chint NB7 MCB
  • Chint Original NB7 Miniature Circuit Breaker 6A 10A 16A 20A 25A 32A 40A 50A 63A B C D Type 1P 2P 3P 4P 6KA Chint NB7 MCB
Chint Original NB7 Miniature Circuit Breaker 6A 10A 16A 20A 25A 32A 40A 50A 63A B C D Type 1P 2P 3P 4P 6KA Chint NB7 MCB

Chint Original NB7 Miniature Circuit Breaker 6A 10A 16A 20A 25A 32A 40A 50A 63A B C D Type 1P 2P 3P 4P 6KA Chint NB7 MCB

  • 5 - 14 Pieces
    $5.30
  • 15 - 29 Pieces
    $5.10
  • >= 30 Pieces
    $4.95
View product details

Chint Original NB7 Miniature Circuit Breaker 6A 10A 16A 20A 25A 32A 40A 50A 63A B C D Type 1P 2P 3P 4P 6KA Chint NB7 MCB

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Electrical Protection: The Chint NB7 MCB provides reliable protection against overcurrents, short circuits, and ground faults with a 6KA breaking capacity, ensuring safety for electrical systems.
  • Versatile Current Handling: Available in rated currents from 6A to 63A (e.g., 16A, 32A, 63A) and pole configurations (1P to 4P), it accommodates diverse circuit requirements for residential and commercial use.
  • Advanced Protection Curves: Features B, C, or D tripping curves (bcd curve:d,c,b) to optimize protection for sensitive electronics, motors, or high-load appliances.

Key features

  • 1. Durable Material Technology

    • With high-quality plastic construction resistant to electrical and mechanical stresses, ensure long-lasting performance in demanding environments. Its robust design offers up to 20% better durability than standard plastic materials*.

  • 2. Intuitive Interactive Design

    • With a clearly marked blue handle and "ON/OFF" positions, easily identify and control circuit status. The compact, modern aesthetic blends seamlessly into electrical panels, unlike bulkier or less user-friendly designs*.

  • 3. High-Performance Breaking Capacity

    • With a 6KA breaking capacity, safely handle extreme fault currents, outperforming models with lower ratings (e.g., 4KA)*. The LSI (Long Service Interval) protection ensures reliable circuit safeguarding over extended periods.

  • 4. Versatile Scenario Solutions

    • With compatibility for 240V/115V systems and ratings from 6A to 63A, adapt to both residential and light commercial applications. Its compact size suits tight spaces, offering 30% smaller footprint than comparable circuit breakers*.

  • 5. Certified Safety Standards

    • With IEC 60898-1 and EN 60898-1 certifications, meet international safety and performance benchmarks, exceeding requirements of non-certified alternatives*. The B/C/D curve options provide precise overcurrent protection tailored to specific loads.

Product details

Chint Original NB7 Miniature Circuit Breaker 6A 10A 16A 20A 25A 32A 40A 50A 63A B C D Type 1P 2P 3P 4P 6KA Chint NB7 MCB

The Chint NB7 Miniature Circuit Breaker (MCB) offers reliable electrical protection for residential and light commercial applications. Available in 1P to 4P configurations and rated currents from 6A to 63A, it features a compact design with high-breaking capacity (6KA) and compliance with international safety standards (IEC60898-1/EN60898-1). Its durable plastic housing and blue handle ensure ease of use and durability in harsh environments.

Technical specifications

FeatureSpecificationBenefit
Breaking Capacity6KASafely interrupts high fault currents
Rated Current6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63AFlexible selection for diverse loads
Trip Curve TypeB, C, DCustomizable overcurrent protection
Voltage Rating240V AC / 115V ACVersatile for global electrical systems
Protection TechnologyLSI (Long Service Interval)Extended reliability and reduced downtime
MaterialDurable thermoplasticResists mechanical/electrical stress
Compliance StandardsIEC60898-1, EN60898-1Ensures global safety and performance
Number of Poles1P, 2P, 3P, 4PAdapts to single-phase or multi-phase systems

Customization guide

Adjust the rated current (6A–63A) and trip curve type (B/C/D) to match specific circuit requirements. For example:

  • B Curve: Fast response for sensitive electronics (e.g., home appliances).
  • C Curve: Balanced for general circuits (e.g., lighting and motors).
  • D Curve: Slow response for inductive loads (e.g., motors in commercial systems).

Get inspired

With its compact design and 6KA breaking capacity, the Chint NB7 ensures robust protection in tight spaces. Whether safeguarding a home’s lighting circuits or commercial HVAC systems, this MCB combines reliability with ease of installation.

Choose your model

ParameterBase Model (B Curve)Advanced Model (C Curve)Pro Model (D Curve)
Breaking Capacity6KA6KA6KA
Trip Response SpeedFast (B Curve)Balanced (C Curve)Slow (D Curve)
Rated Current Range6A–32A10A–50A16A–63A
Ideal ApplicationsHome appliancesLighting/motorsIndustrial machinery

Supplier's note

  1. Three Technical Breakthroughs:

    • 6KA Breaking Capacity: Outperforms industry benchmarks, ensuring safe disconnection during extreme fault currents.
    • LSI Technology: Reduces maintenance needs by 40% compared to traditional MCBs.
    • IEC/EN Compliance: Meets global safety standards, enabling seamless integration into international projects.

  2. Optimal Version Selection:

    • Base Model (B Curve): Ideal for residential circuits (e.g., home electronics) requiring fast overcurrent protection.
    • Advanced Model (C Curve): Best for commercial lighting and small motors needing balanced response.
    • Pro Model (D Curve): Designed for industrial systems with inductive loads, offering triple the short-circuit withstand capability of legacy models.

With the Pro version’s D Curve and 63A rating, you can safely power high-demand machinery while minimizing downtime. Pair its robust design with LSI technology to ensure long-term reliability in harsh environments.

Frequently asked questions

  • Which Chint NB7 MCB model is best for a 16A residential circuit?

  • How do I choose between B, C, or D curves for the Chint NB7 MCB?

  • Is the Chint NB7 MCB suitable for both 240V and 115V systems?

  • Can the Chint NB7 MCB protect against ground faults?

  • What materials make the Chint NB7 MCB durable?

  • Does the Chint NB7 MCB comply with international safety standards?

  • Can I customize the Chint NB7 MCB for a 2P configuration?

  • Why is the 6kA breaking capacity important for the Chint NB7 MCB?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Breaking CapacityIndustrial/Commercial SystemsIndustry Standard: 5KA (IEC 60898)
Our Base/Advanced: 6KA (IEC 60898) ▲
(18% higher fault interruption)		Handles severe overcurrents, reducing fire riskRequires robust wiring for full performance
Rated Current RangeResidential to Light CommercialIndustry Standard: Up to 40A
Our Base: 6A–40A
Our Advanced: 6A–63A ▲
(+23A max capacity)		Versatile for small to large circuits (e.g., HVAC systems)Higher currents may need thicker cables
Protection Type (LSI)Overload-Prone EnvironmentsIndustry Standard: Standard interrupter
Our Base/Advanced: LSI (IEC 60947-2) ▲
(Suppresses arcs)		Reduces arc flash risk, prolongs equipment lifespanSlightly higher cost compared to non-LSI models
Breaking Curve (B/C/D)High-Fault Industrial SettingsIndustry Standard: B/C curves only
Our Base/Advanced: B/C/D ▲
(Adds D curve for 500–7,000A faults)		Protects against extreme fault currents in heavy machineryRequires expert selection to avoid nuisance tripping
Number of Poles3-Phase SystemsIndustry Standard: Up to 3P
Our Base: 1P/2P
Our Advanced: 3P/4P ▲
(Full phase control)		Manages complex 3-phase circuits (e.g., motors)More poles increase installation complexity
Compliance StandardsGlobal ProjectsIndustry Standard: IEC 60898
Our Base/Advanced: IEC 60898 + EN 60898 ▲
(EU certification)		Meets international safety norms for export/import marketsNo cost difference, but requires documentation for compliance audits

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