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Circuit Breakers
  • Adjustable Bolt on Type Single Pole 100 Amp 400a Breakers Mcb and Mccb 400a 250 Amp 4pole Moulded case Circuit Breaker Electric
  • Adjustable Bolt on Type Single Pole 100 Amp 400a Breakers Mcb and Mccb 400a 250 Amp 4pole Moulded case Circuit Breaker Electric
  • Adjustable Bolt on Type Single Pole 100 Amp 400a Breakers Mcb and Mccb 400a 250 Amp 4pole Moulded case Circuit Breaker Electric
  • Adjustable Bolt on Type Single Pole 100 Amp 400a Breakers Mcb and Mccb 400a 250 Amp 4pole Moulded case Circuit Breaker Electric
Adjustable Bolt on Type Single Pole 100 Amp 400a Breakers Mcb and Mccb 400a 250 Amp 4pole Moulded case Circuit Breaker Electric

Adjustable Bolt on Type Single Pole 100 Amp 400a Breakers Mcb and Mccb 400a 250 Amp 4pole Moulded case Circuit Breaker Electric

  • 50 - 499 Pieces
    $48
  • >= 500 Pieces
    $42

Customization:

Customized logo（Min.Order: 1000 pieces）
View product details

Adjustable Bolt on Type Single Pole 100 Amp 400a Breakers Mcb and Mccb 400a 250 Amp 4pole Moulded case Circuit Breaker Electric

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Electrical Protection: Designed to safeguard circuits against overcurrent, short circuits, and ground faults with a BCD curve and 36kA breaking capacity, ensuring reliable interruption of fault currents.
  • High-Capacity Current Handling: Supports rated currents up to 400A (MCCB) and 250A, with voltage compatibility for 690V/415V systems, making it suitable for demanding electrical installations.

Key features

  • 1. Material Technology

    • With a high-grade plastic and corrosion-resistant metal body, this circuit breaker withstands harsh industrial environments better than standard plastic-only models*. The molded case design ensures durability against mechanical and electrical stresses.

  • 2. Interactive Design

    • With adjustable front-panel knobs and switches for custom trip settings, easily tailor protection parameters to specific applications. This interactive design allows faster setup compared to non-adjustable breakers*.

  • 3. Performance Parameters

    • With a 36kA breaking capacity and 690V rating, this breaker handles extreme overcurrent scenarios and short circuits more effectively than lower-rated models*. The BCD Curve C ensures precise overcurrent protection for diverse load types.

  • 4. Scenario Solutions

    • Designed for continuous commercial use, it supports currents up to 690A and three-phase systems, making it ideal for industrial applications where traditional residential breakers may fail under heavy loads*. The compact DIN rail mounting enables seamless integration into modular systems.

  • 5. Certification Standards

    • Complies with IEC/EN 60947-2 and NEMA AB1 standards, ensuring safety and reliability beyond non-certified alternatives*. These certifications confirm compliance with international safety and performance benchmarks.

Product details

Adjustable Bolt on Type Single Pole 100 Amp 400a Breakers Mcb and Mccb 400a 250 Amp 4pole Moulded case Circuit Breaker Electric

The YUANKY NSX 400F three-pole molded case circuit breaker (MCCB) delivers robust protection for industrial and commercial applications. With a rated voltage of 690V/415V and a breaking capacity of 36kA, it ensures reliable overcurrent and ground fault protection. Constructed from high-grade plastic and metal, this compact, DIN-rail mountable device offers adjustable trip characteristics (BCD Curve C) and compliance with IEC/EN 60947-2 and NEMA AB1 standards.

Technical specifications

FeatureSpecificationApplication Scenario
MaterialPlastic and metal compositeWithstands mechanical/thermal stress in harsh environments
Breaking Capacity36kA (Icu)Safeguards high-current systems against short circuits
Voltage Rating690V AC (Max)Powers medium-voltage industrial machinery
Frequency50HzCompatible with standard grid frequencies
Trip CurveBCD Curve C (adjustable)Customizable overload protection for variable loads
CertificationsIEC/EN 60947-2, NEMA AB1Meets global safety and performance benchmarks

Customization guide

Adjustable trip characteristics (via front panel knobs) allow fine-tuning of overload and short-circuit protection thresholds. The DIN rail mounting system enables quick installation in modular electrical systems.

Get inspired

The NSX 400F’s compact design and high interrupting capacity make it ideal for safeguarding industrial motors, distribution panels, or commercial HVAC systems. Its modular compatibility with YUANKY’s NSX series ensures scalable system integration.

Choose your model

ParameterBase Model (240A)Advanced Model (400A)Pro Model (690A)
Rated Current240A+67% (400A)+158% (690A)*
Breaking Capacity25kA36kA (+44%)50kA (+100%)
Voltage Support415V690V (+66%)800V (+92%)
Trip Curve RangeB/CB/C/DB/C/D + adjustable

Supplier's note

  1. Technical Breakthroughs:

    • 36kA Breaking Capacity: Outperforms industry standards by 20%, enabling safer handling of high-energy faults.
    • BCD Curve C: Balances sensitivity and selectivity for motor circuits and power distribution.
    • IEC/EN 60947-2 Compliance: Ensures interoperability with global electrical systems.

  2. Version Selection Guide:

    • Base Model (240A): Ideal for small commercial setups (e.g., retail stores) with standard load requirements.
    • Advanced Model (400A): Suitable for industrial machinery (e.g., pumps, compressors) needing higher current handling.
    • Pro Model (690A): Designed for heavy-duty applications (e.g., data centers, factories) requiring 800V systems and extreme fault protection.

Example Use Case: With the Pro Model’s 50kA breaking capacity, you can protect critical infrastructure against severe short circuits, reducing downtime by 30% compared to traditional breakers.

Frequently asked questions

  • Which 3-pole molded case circuit breaker suits high-current industrial applications?

  • What certifications does the YUANKY NSX 400F 400A breaker comply with?

  • Why choose plastic over all-metal enclosures for MCCBs?

  • Can the NSX 400F be customized for DIN rail mounting?

  • How do I maintain the YUANKY NSX 400F’s overcurrent protection?

  • Does the NSX 400F provide ground fault protection?

  • What’s the breaking capacity of the 4-pole 400A MCCB for commercial use?

  • Is the NSX 400F suitable for both commercial and industrial voltage needs?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Breaking CapacityHigh short-circuit industrial plantsBase: 36kA (▲1 over industry 25kA)
Advanced: 40kA (▲1 over Base)		Handles extreme fault currents beyond industry normsHigher cost due to advanced interrupting tech
Voltage RatingHigh-voltage motor control systemsBase: Up to 690V (▲1 over industry 440V)
Advanced: 750V (▲1)		Operates in demanding high-voltage environmentsNot backward-compatible with lower voltages
Trip Curve (BCD Curve C)Motor protection circuitsBase: B Curve (3-5x rated current trip)
Advanced: Adjustable curves (▲1)		Protects motors from short-term overloadsLess flexible than adjustable curves (Advanced)
MaterialHarsh mechanical/chemical environmentsBase: Reinforced plastic + metal (UL 94 V-0)
Advanced: Full-metal enclosure (▲1 heat resistance)		Lightweight durabilityAdvanced: Higher weight and cost
Compliance StandardsGlobal installationsBase: IEC 60947-2 & NEMA AB1 (▲1 dual compliance)
Advanced: CE + UL (▲1)		Meets both European and North American regsCertification adds to manufacturing cost
Rated Current (Adjustable)Variable-load machineryBase: Adjustable up to 400A
Advanced: 630A (▲1)		Versatile for fluctuating current demandsRequires professional adjustment

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