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.

    9348 Producten voor MCBs

    ABB
    1
    25A
    SU200 MR
    Type K
    230V
    10 kA
    -
    System Pro M Compact
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Lovato
    3
    25A
    -
    Type C
    400V
    10 kA
    -
    -
    10 kA
    MCB
    DIN Rail Mount
    54mm
    76mm
    116mm
    P1MBUH3PC25
    -
    -
    -
    ABB
    4
    32A
    SU200 M
    Type K
    480V
    15 kA
    -
    -
    15 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Eaton
    1
    8A
    FAZ
    Type D
    230V
    10 kA
    -
    xEffect
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Eaton
    1
    16A
    PLN6
    Type B
    230V
    6 kA
    -
    PLN6
    6 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Siemens
    3+N
    25A
    5SY4
    Type B
    400V
    5 kA
    72V
    SENTRON
    5 kA
    MCB
    DIN Rail Mount
    90mm
    72mm
    76mm
    5SY4625
    Extended product life
    Yes
    -
    Eaton
    1+N
    2A
    FAZ
    Type D
    230V
    10 kA
    -
    xEffect
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Siemens
    -
    -
    5ST3
    -
    -
    -
    -
    SENTRON
    -
    MCB
    DIN Rail Mount
    -
    -
    -
    5ST3044
    -
    -
    -
    Schneider Electric
    2
    40A
    -
    -
    240V
    -
    -
    -
    -
    -
    DIN Rail Mount
    -
    -
    -
    -
    -
    Yes
    Green Premium
    Eaton
    3+N
    5A
    FAZ
    Type B
    400V
    10 kA
    -
    xEffect
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Eaton
    2
    25A
    FAZ
    Type B
    440V
    7.5 kA
    60V
    xEffect
    7.5 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    3
    25A
    S303
    Type K
    415V
    100 kA
    125V
    -
    100 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Schneider Electric
    1
    8A
    C60SP
    Type D
    415V
    20 kA
    60V
    Multi 9
    20 kA
    Residential MCB
    DIN Rail Mount
    81mm
    18mm
    72mm
    M9F23108
    -
    Yes
    Green Premium
    ABB
    4
    50A
    S804N
    Type B
    690V
    36 kA
    -
    -
    36 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    4
    8A
    -
    Type B
    400V
    -
    -
    SMISSLINE TP
    -
    -
    DIN Rail Mount
    -
    -
    -
    -
    -
    -
    -
    ABB
    1
    25A
    S300P
    Type Z
    240V
    25 kA
    72V
    System Pro M Compact
    25 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Eaton
    1
    20A
    FAZ
    Type B
    240V
    15 kA
    60V
    xEffect
    15 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    3
    500mA
    S200
    Type K
    400V
    10 kA
    110V
    System Pro M Compact
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    1+N
    16A
    S-ARC1 M
    Type B
    240V
    10 kA
    -
    -
    10 kA
    -
    DIN Rail Mount
    85mm
    35mm
    69mm
    S-ARC1 M B16
    -
    -
    -
    Siemens
    2
    500mA
    5SJ4205
    Type C
    400V
    10 kA
    60V
    SENTRON
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
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