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    • Miniature circuit breakers (MCB)
    • MT125A
    EAN-Nr.
    3250614507052
    Packaging
    12 Pieces
    • Miniature circuit breakers (MCB)

    MCB 1P 6kA B-25A 1M MT125A

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    MCB 1P 6kA B-25A 1M

    MT125A

    • Accessories
    • Technical characteristics
    • Environmental value
    • Documentations
    • More products
    Download the sheet

    Complete your system

    Optional accessories

    • Mechanic accessories for low-voltage components 1 products available

    Complete your system

    • Mechanic accessories for low-voltage components
    • LZ060

      Heat dissipation insert

      0.00 €  / *

    Technical characteristics

    Electric current
    • Rated current
      25 A
    • Rated short-circuit breaking capacity Icn under 230 V AC according to IEC 60898-1
      6 kA
    • Rated current -15°C
      31 A
    • Rated current -10°C
      30.40 A
    • Rated current -5°C
      29.80 A
    • Rated current at 0°C
      29.10 A
    • Rated current 5°C
      28.50 A
    • Rated current 10°C
      27.80 A
    • Rated current 15°C
      27.10 A
    • Rated current at 20°C
      26.40 A
    • Rated current 25°C
      25.70 A
    • Rated current 30°C
      25 A
    • Rated current 35°C
      24.20 A
    • Rated current at 40°C
      23.50 A
    • Rated current at 45°C
      22.70 A
    • Rated current at 50°C
      21.80 A
    • Rated current 55°C
      21 A
    • Rated current 60°C
      20 A
    • Rated current 65°C
      19.30 A
    • Rated current 70°C
      18.40 A
    Architecture
    • Type of pole
      1P
    Capacity
    • Number of modules
      1
    Main electrical attributes
    • Rated short-circuit breaking capacity Icn AC according to IEC 60898-1
      6 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
      230 - 400 V
    • Rated insulation voltage Ui
      500 V
    • Rated impulse withstand voltage Uimp
      4,000 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
    • Cross-section flexible conductor
      1 - 25 mm²
    • Cross-section rigid conductor
      1 - 35 mm²
    Use conditions
    • Degree of pollution according to IEC 60664 / IEC 60947-2
      2
    • Class of energy limitation I²t
      3
    • Air humidity protection
      For all climates
    • Operating temperature
      -25 - 70 °C
    Power
    • Total power loss under IN
      3 W
    Connectivity
    • Type of connection
      Screw terminal
    • Top connection alignment for modular devices
      Aligned terminal
    • Down connection alignment for modular devices
      Aligned terminal
    Dimensions
    • Height
      83 mm
    • Width
      17.50 mm
    • Depth
      70 mm

    Environmental value

    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

    Certifications and documents

    MCB 1P 6kA B-16A, 1 module
    PDF
    67,85 MB
    REACH declaration MT125A
    PDF
    RoHS report MT125A
    PDF

    Downloads

    • Product datasheet

      Image Hager Product data sheet MT125A  | Hager

      Hager Product data sheet MT125A

      MCB 1P 6kA B-25A 1M

      PDF
    • Declaration of conformity

      Image Declaration  | Hager

      Declaration

      Declaration of conformity International 2022-01-26

      PDF
      305,52 kB
      Image Declaration  | Hager

      Declaration

      Declaration of conformity International 2022-05-12

      PDF
      468,55 kB
      Image EU Declaration of Conformity  | Hager

      EU Declaration of Conformity

      Declaration of conformity en-GB 2025-12-08

      PDF
      808,67 kB
      Image UKCA Declaration of Conformity  | Hager

      UKCA Declaration of Conformity

      Declaration of conformity en-GB 2025-11-13

      PDF
      813,16 kB
    More documentation

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    • 3
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    • 4
      NCN116A - MCB 1P 10kA/15kA C-16A 1M
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    • 5
      NCN120A - MCB 1P 10kA/15kA C-20A 1M
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    Who are we

    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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