MCBs | Miniature Circuit Breakers | RS
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    MCBs

    MCBs, or Miniature Circuit Breakers, are electrical devices designed to protect an electrical circuit from damage caused by overcurrent. They serve as a crucial component in the electrical distribution system of buildings, homes, and industrial facilities. You can learn more in our MCB guide.

    RS offer a comprehensive selection of high-quality Miniature Circuit Breakers from industry-leading brands including ABB, Siemens, Schneider Electric, Eaton, Rockwell Automation and Lovato.

    How does a miniature circuit breaker work?

    MCBs automatically disconnect the electrical circuit when they detect a current exceeding the rated capacity of the circuit. This action helps prevent overheating and potential damage to the wiring, appliances, or other connected devices.

    What are the different types of circuit breakers?

    MCBs come in different types, including Type B, C, and D, each designed to trip at different levels of overcurrent. The choice of MCB type depends on the specific characteristics of the electrical load it is protecting.

    • Type B: General purpose, suitable for domestic installations. Trips between 3 and 5 times the load current.
    • Type C: Designed for applications with higher inrush currents, such as motors and transformers. Trips between 5 and 10 times the full load current.
    • Type D: Intended for circuits with significant inrush currents, like those associated with high-powered equipment. Trips between 10 and 20 times the full load current.

    What is the tripping mechanism of an MCB?

    MCBs typically use thermal and magnetic tripping mechanisms. The thermal component responds to prolonged overcurrent conditions, while the magnetic component reacts to short-circuit currents.

    Where are MCBs installed?

    MCBs are installed in distribution boards or consumer units and are often used in conjunction with residual current devices (RCDs) for enhanced electrical safety.

    Can I reset an MCB?

    After tripping due to overcurrent, MCBs can usually be reset manually. However, it is crucial to investigate and address the cause of the overcurrent before resetting to avoid potential hazards.

    MCBs play a vital role in electrical safety by preventing electrical fires and protecting equipment from damage caused by excessive current. They are an integral part of modern electrical installations, contributing to the overall reliability and safety of electrical systems.

    8299 Producten voor MCBs

    Siemens
    3P
    63A
    5SY4
    Type B
    400V
    10 kA
    -
    Sentron
    10 kA
    MCB
    DIN Rail Mount
    52.8mm
    76mm
    90mm
    -
    Extended product life
    Yes
    -
    Eaton
    3P
    1.5A
    FAZ
    Type C
    400V
    10 kA
    -
    xEffect
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Siemens
    2P
    20A
    5SL6
    Type B
    -
    -
    -
    SENTRON
    -
    MCB
    DIN Rail Mount
    90mm
    36mm
    76mm
    5SL6220
    Extended product life
    Yes
    -
    ABB
    3
    25A
    S200M
    Type Z
    400V
    15 kA
    125V
    System Pro M Compact
    15 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Eaton
    3P+N
    5A
    FAZ
    Type D
    400V
    10 kA
    -
    xEffect
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    4
    63A
    S200 M UC
    Type C
    400V
    10 kA
    440V
    System Pro M Compact
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    2
    60A
    S200 M UC
    Type Z
    400V
    10 kA
    440V
    System Pro M Compact
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    3P+N
    13A
    S200
    Type C
    -
    -
    -
    System Pro M Compact
    -
    -
    DIN Rail Mount
    -
    -
    -
    S203-C13NA
    Designed for disassembly
    Yes
    -
    ABB
    2
    16A
    SU200 M
    Type Z
    440V
    15 kA
    96V
    -
    15 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    3
    5A
    S200 M UC
    Type K
    400V
    10 kA
    440V
    System Pro M Compact
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    3
    125A
    2CCS
    -
    -
    50 KA
    -
    -
    50 KA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Allen Bradley
    3P
    200mA
    1492-GS
    Type G
    -
    -
    -
    1492-GS
    -
    MCB
    DIN Rail Mount
    80mm
    25mm
    88.5mm
    1492-GS3G002
    -
    -
    -
    Allen Bradley
    2P
    1.6A
    1492-D
    Type C
    -
    10 kA
    -
    1492-D2
    10 kA
    MCB
    DIN Rail Mount
    88mm
    17.5mm
    69mm
    1492-D2C016
    -
    -
    -
    Eaton
    3P
    3A
    FAZ
    Type B
    400V
    10 kA
    -
    xEffect
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Eaton
    3P
    20A
    -
    Type D
    230 → 400V
    6 kA
    -
    xEffect
    6 kA
    MCB
    DIN Rail Mount
    80mm
    17.5mm
    62mm
    -
    -
    -
    -
    ABB
    2
    10A
    SU200 MR
    Type K
    400V
    15 kA
    -
    System Pro M Compact
    15 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    3+N
    20A
    S300P
    Type B
    415V
    25 kA
    -
    System Pro M Compact
    25 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    1P
    32A
    S200
    Type C
    -
    -
    -
    System Pro M Compact
    -
    -
    DIN Rail Mount
    -
    -
    -
    S201-C32
    Designed for disassembly
    Yes
    -
    ABB
    3
    1A
    SU200 M
    Type C
    400V
    15 kA
    -
    -
    15 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    4
    80A
    S800U
    Type K
    240V
    50 kA
    -
    -
    50 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
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