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.

    9449 Produits présentés pour MCBs

    Siemens
    1
    20A
    5SP37
    Type E
    230V
    25 kA
    -
    SENTRON
    25 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    3+N
    8A
    S200
    Type K
    -
    -
    -
    System Pro M Compact
    -
    -
    DIN Rail Mount
    -
    -
    -
    S203-K8NA
    Designed for disassembly
    Yes
    -
    Eaton
    3
    8A
    FAZ
    Type D
    415V
    15 kA
    60V
    xEffect
    15 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    1
    20A
    S400M
    Type C
    230 V, 400V
    10 kA
    60V
    SMISSLINE TP
    10 kA
    MCB
    DIN Rail Mount
    91mm
    18mm
    82mm
    S401M-C20
    -
    -
    -
    ABB
    1
    63A
    S200 M UC
    Type C
    230V
    10 kA
    220V
    System Pro M Compact
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Eaton
    1
    10A
    FAZ
    Type B
    240V
    7.5 kA
    60V
    xEffect
    7.5 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Siemens
    1+N
    13A
    5SY6
    Type C
    230V
    6 kA
    -
    SENTRON
    6 kA
    MCB
    DIN Rail Mount
    36mm
    76mm
    90mm
    5SY6513-7
    Extended product life
    Yes
    -
    Eaton
    3+N
    500mA
    FAZ
    Type D
    400V
    10 kA
    -
    xEffect
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    4
    10A
    S200
    Type Z
    -
    -
    -
    System Pro M Compact
    -
    -
    DIN Rail Mount
    -
    -
    -
    S204-Z10
    Designed for disassembly
    Yes
    -
    Siemens
    1+N
    63A
    5SY7
    Type C
    230V
    15 kA
    -
    SENTRON
    15 kA
    MCB
    DIN Rail Mount
    36mm
    76mm
    90mm
    5SY7563-7
    Extended product life
    Yes
    -
    Eaton
    2
    6A
    FAZ
    Type D
    415V
    25 kA
    60V
    xEffect
    25 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    3
    25A
    S200 M UC
    Type Z
    400V
    10 kA
    440V
    System Pro M Compact
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    2
    3A
    -
    Type Z
    440V
    -
    -
    SMISSLINE TP
    -
    -
    DIN Rail Mount
    -
    -
    -
    -
    -
    -
    -
    Eaton
    4
    32A
    PXL
    Type B
    400V
    10 kA
    -
    xPole - PXL
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Siemens
    3
    25A
    5SL4
    Type D
    400V
    10 kA
    -
    SENTRON
    10 kA
    MCB
    DIN Rail Mount
    54mm
    76mm
    90mm
    5SL4325-8
    Extended product life
    Yes
    -
    Eaton
    3
    1A
    FAZ
    Type D
    415V
    15 kA
    60V
    xEffect
    15 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ABB
    1
    6A
    S801S
    Type C
    400V
    50 kA
    -
    -
    50 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Siemens
    1+N
    16A
    5SY6
    Type B
    230V
    5 kA
    72V
    SENTRON
    5 kA
    MCB
    DIN Rail Mount
    90mm
    36mm
    76mm
    5SY6516
    Extended product life
    Yes
    -
    Allen Bradley
    3
    8A
    1492-SPM
    Type C
    277 V, 480V
    10 kA
    -
    1492
    10 kA
    MCB
    DIN Rail Mount
    53mm
    75mm
    88mm
    -
    -
    -
    -
    Siemens
    1
    35A
    5SJ
    -
    -
    -
    -
    SENTRON
    -
    -
    DIN Rail Mount
    -
    -
    -
    -
    -
    -
    -
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