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    • Catalog
    • Circuit Protec­tion & Modular Switches
    • Circuit Protec­tion
    • Mini­ature circuit breakers (MCB and MCB Multi­polar)
    • NDN304A
    EAN
    3250614619205
    VPE
    4 pieces
    • Mini­ature circuit breakers (MCB and MCB Multi­polar)

    MCB 3P 10kA/15kA D-4A 3M NDN304A

    Price
    £122.43
    / piece *
    £122.43
    / piece *
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    MCB 3P 10kA/15kA D-4A 3M

    NDN304A

    • Accessories
    • Technical characteristics
    • catalog.pageproduct.title_sustainability.h2
    • Documentations
    • More products

    product.page.accessories.title

    product.page.accessories.associated-products

    • Locking inter­locking func­tions 1 product.page.accessories.products-available
    • Phase separ­a­tion func­tions 1 product.page.accessories.products-available
    • Modular phase busbar 1 product.page.accessories.products-available
    • Auxil­i­aries contact block 2 product.page.accessories.products-available
    • Shunt release 2 product.page.accessories.products-available
    • Under voltage coil 1 product.page.accessories.products-available

    product.page.accessories.title-modal

    • Locking inter­locking func­tions
    • Phase separ­a­tion func­tions
    • Modular phase busbar
    • Auxil­i­aries contact block
    • Shunt release
    • Under voltage coil
    • MZN175

      Padlockable locking kit for MCB, RCCB and RCBO

      £10.06  / piece*
    • MZN121

      1 set of 3 inter-pole barriers for MCB

      £47.40  / piece*
    • KDN363B

      Insulated busbar 3P 63A fork 10mm² 57M

      £91.70  / piece*
    • MZ201

      Auxiliary contact 1C+1O 6A 240V AC

      £71.47  / piece*
    • MZ202

      Alarm contact 1C+1O 6A 240V AC

      £96.71  / piece*
    • MZ203

      Shunt trip 230-415V AC 110-130V DC

      £72.16  / piece*
    • MZ204

      Shunt trip 24-48V AC 12-48V DC

      £71.47  / piece*
    • MZ206

      Under voltage release 230V AC

      £72.16  / piece*

    Technical characteristics

    Elec­tric current
    • Rated current IN
      4 A
    • Rated short-­cir­cuit breaking capa­city Icn under 230 V AC according to IEC 60898-1
      20 kA
    • Rated ulti­mate short-­cir­cuit breaking capa­city Icu AC IEC 60947-2
      15 kA
    • Rated ulti­mate short-­cir­cuit breaking capa­city Icu under 400 V AC IEC 60947-2
      15 kA
    • Rated current at -15°C
      4.73 A
    • Rated current at -10°C
      4.65 A
    • Rated current at -5°C
      4.57 A
    • Rated current at 0°C
      4.49 A
    • Rated current at 5°C
      4.41 A
    • Rated current at 10°C
      4.33 A
    • Rated current at 15°C
      4.24 A
    • Rated current at 20°C
      4.16 A
    • Rated current at 25°C
      4.08 A
    • Rated current at 30°C
      4 A
    • Rated current at 35°C
      3.9 A
    • Rated current at 40°C
      3.79 A
    • Rated current at 45°C
      3.69 A
    • Rated current at 50°C
      3.58 A
    • Rated current at 55°C
      3.48 A
    • Rated current at 60°C
      3.37 A
    • Rated current at 65°C
      3.27 A
    • Rated current at 70°C
      3.16 A
    • Rated short-­cir­cuit breaking capa­city Icn under 400 V AC according to IEC 60898-1
      10 kA
    • Rated service breaking capa­city Ics AC according to IEC 60898-1
      7.50 kA
    • Rated ulti­mate short-­cir­cuit breaking capa­city Icu under 230 V AC IEC 60947-2
      30 kA
    Archi­tec­ture
    • Type of pole
      3P
    • Curve
      D
    Capa­city
    • Number of modules
      3
    Main elec­trical attrib­utes
    • Rated short-­cir­cuit breaking capa­city Icn AC according to IEC 60898-1
      10 kA
    Install­a­tion, mounting
    • Nominal tight­ening torque top terminal
      2.80 - 2.80 Nm
    • Nominal tight­ening torque down terminal
      2.80 - 2.80 Nm
    • Nominal tight­ening torque
      2.80 - 2.80 Nm
    • Type of bottom connec­tion for modular devices
      bicon­nect
    • Type of top connec­tion for modular devices
      Screw terminal
    • 360° mounting posi­tion possible
      Yes
    Voltage
    • Rated oper­a­tional voltage Ue
      400 - 400 V
    • Type voltage supply
      AC
    • Rated insu­la­tion voltage Ui
      500 V
    • Rated impulse with­stand voltage Uimp
      6,000 V
    Frequency
    • Frequency
      50 - 60 Hz
    Connec­tion
    • Cross-sec­tion of input and output with screws, for massive conductors
      1 - 35 mm²
    • Cross-sec­tion of input and output with screws, for flex­ible conductors
      1 - 25 mm²
    • Cross-sec­tion of input with screws, for flex­ible conductors
      1 - 25 mm²
    • Cross-sec­tion of input with screws, for massive conductors
      1 - 35 mm²
    Safety
    • Ingress Protec­tion (IP) class
      IP20
    • Grid distance
      60 mm
    Use condi­tions
    • Degree of pollu­tion according to IEC 60664 / IEC 60947-2
      2
    • Class of energy limit­a­tion I²t
      3
    • Oper­ating temper­ature
      -25 - 70 °C
    Power
    • Power dissip­a­tion at IN
      8.18 W
    Connectivity
    • Type of connec­tion
      Screw terminal
    • Top connec­tion align­ment for modular devices
      Aligned terminal
    • Down connec­tion align­ment for modular devices
      Aligned terminal
    Dimen­sions
    • Width
      52.50 mm
    • Height
      83 mm
    • Depth
      70 mm
    Endur­ance
    • Elec­tric endur­ance in number of cycles
      4,000

    catalog.pageproduct.title_sustainability.h2

    We are committed to bettering our environmental performance by reducing our footprint while acting as a sustainability enabler for our customers Learn More

    RoHS conform Yes

    catalog.pageproduct.sustainability_block.downloads_h3

    PEP - MCB 1P 6kA B-16A, 1 module (English)
    PDF
    67,85 MB
    REACH declaration NDN304A
    PDF
    RoHS report NDN304A
    PDF

    Downloads

    • Product image

      Image NDN304A  | Hager UK

      Product Image NDN304A

    • GeneratedProductDatasheet

      Image Hager Product data sheet NDN304A  | Hager UK

      Hager Product data sheet NDN304A

      MCB 3P 10kA/15kA D-4A 3M

      PDF
    • ProductDataSheet

      Image UK_PD_TDS_TransformerMotorprotection.pdf  | Hager UK

      UK_PD_TDS_TransformerMotorprotection.pdf

      Technical data sheet recommending MCB's for single phase and three phase transformers.

      PDF
      204,90 kB
    • ProductECDeclaration

      Image Declaration of conformity en-US 2026-07-15  | Hager UK

      Declaration of conformity en-US 2026-07-15

      PDF
      274,42 kB
      Image UKCA Declaration of Conformity  | Hager UK

      UKCA Declaration of Conformity

      Declaration of conformity en-GB 2024-10-02

      PDF
      653,93 kB
    More documentation

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      / piece *

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    We deliver safe and simple electrical solutions, from energy distribution to lighting control, for commercial and residential buildings. We want to make life on our planet safer, cleaner and more enjoyable. While being easy to work with, we remain by your side throughout the entire project, cooperating, collaborating and co-creating with you.

     

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    Hager Ltd, Hortonwood 50, Telford, Shropshire, TF1 7FT
    Registered in England, No: 01551990
    VAT Number: GB 713 2273 68