Connectez-vous / Enregistrez-vous pour accéder aux avantages de votre compte
Récemment recherché

    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.

    10198 Produits présentés pour MCBs

    • N° de stock RS 259-739
    • Référence fabricant 278716 FAZ-K40/1N
    la pièce
    104,03 €
    Eaton
    1+N
    40A
    FAZ
    Type K
    230V
    15 kA
    -
    xEffect
    15 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Better World
    • N° de stock RS 239-2673
    • Référence fabricant 5SL6025-6
    la pièce
    62,62 €
    Siemens
    1+N
    25A
    -
    Type B
    230V
    -
    -
    5SL6
    -
    -
    DIN Rail Mount
    -
    -
    -
    -
    Concentrated or compact solution, Extended product life, Low carbon manufacture, Saves energy
    Yes
    -
    Better World
    • N° de stock RS 212-8972
    • Référence fabricant 5SY7340-7
    la pièce
    194,63 €
    Siemens
    3
    40A
    5SY7
    Type C
    400V
    5 kA
    72V
    SENTRON
    5 kA
    MCB
    DIN Rail Mount
    90mm
    54mm
    76mm
    5SY7340-7
    Extended product life
    Yes
    -
    • N° de stock RS 141-208
    • Référence fabricant 2CCS863001R1427
    la pièce
    503,74 €
    ABB
    3
    10A
    S803S
    UC-K
    -
    50 kA
    750V
    -
    50 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    • N° de stock RS 299-891
    • Référence fabricant 5SJ4115-8HG40
    la pièce
    50,70 €
    Siemens
    1
    2A
    5SJ4115
    Type D
    400V
    14 kA
    60V
    SENTRON
    14 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Better World
    • N° de stock RS 237-3290
    • Référence fabricant 2CDS253103R0427
    la pièce
    159,08 €
    ABB
    3+N
    10A
    S200
    Type K
    -
    -
    -
    System Pro M Compact
    -
    -
    DIN Rail Mount
    -
    -
    -
    S203-K10NA
    Designed for disassembly
    Yes
    -
    la pièce
    65,80 €
    Siemens
    1
    32A
    5SY8
    Type D
    400V
    30 kA
    60V
    SENTRON
    30 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    • N° de stock RS 227-0675
    • Référence fabricant 239053 FAZ6-B63/1N
    la pièce
    61,07 €
    Eaton
    1+N
    63A
    -
    Type B
    -
    -
    -
    xEffect
    -
    -
    DIN Rail Mount
    -
    -
    -
    FAZ6-B63/1N
    -
    -
    -
    • N° de stock RS 230-1045
    • Référence fabricant 177488 FAZ6-D4/1
    la pièce
    32,32 €
    Eaton
    1
    4A
    -
    Type D
    -
    -
    -
    xEffect
    -
    -
    DIN Rail Mount
    -
    -
    -
    FAZ6-D4/1
    -
    -
    -
    • N° de stock RS 203-067
    • Référence fabricant 2CDS383001R0254
    la pièce
    156,05 €
    ABB
    3
    25A
    S303
    Type C
    415V
    100 kA
    125V
    -
    100 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    • N° de stock RS 231-9759
    • Référence fabricant 2CDS273337R0204 SU203M-C20
    1 boîte de 1
    157,56 €
    ABB
    3
    20A
    SU200M
    Type C
    400V
    15 kA
    400V
    System Pro M Compact
    15 kA
    MCB
    DIN Rail Mount
    111mm
    52.5mm
    69mm
    SU203M-C20
    -
    -
    -
    • N° de stock RS 200-088
    • Référence fabricant 2CDS384001R0087
    la pièce
    209,07 €
    ABB
    4
    200mA
    S300P
    Type K
    415V
    100 kA
    -
    System Pro M Compact
    100 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    • N° de stock RS 231-8333
    • Référence fabricant 5SP3720-2KK01
    la pièce
    140,54 €
    Siemens
    1
    20A
    5SP3720
    Type E
    -
    -
    -
    SENTRON
    -
    -
    DIN Rail Mount
    -
    -
    -
    5SP3720-2KK01
    -
    -
    -
    la pièce
    109,00 €
    Siemens
    2
    13A
    5SY4
    Type A
    400V
    20 kA
    60V
    SENTRON
    20 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Better World
    la pièce
    167,36 €
    Siemens
    3+N
    32A
    5SY6
    Type C
    400V
    5 kA
    72V
    SENTRON
    5 kA
    MCB
    DIN Rail Mount
    90mm
    72mm
    76mm
    5SY6632-7
    Extended product life
    Yes
    -
    la pièce
    124,00 €
    Siemens
    2
    8A
    5SY4
    Type A
    400V
    20 kA
    60V
    SENTRON
    20 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    • N° de stock RS 140-624
    • Référence fabricant 2CCS573001R0321
    la pièce
    168,17 €
    ABB
    3
    32A
    S403M
    Type D
    12V
    10 kA
    -
    -
    10 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Better World
    • N° de stock RS 209-7458
    • Référence fabricant 5SL4313-6
    la pièce
    108,58 €
    Siemens
    3
    13A
    5SL4
    Type B
    400V
    -
    72V
    SENTRON
    -
    MCB
    DIN Rail Mount
    90mm
    54mm
    76mm
    5SL4313-6
    Extended product life
    Yes
    -
    Better World
    • N° de stock RS 224-7782
    • Référence fabricant 3VA1104-5MG36-0AA0
    la pièce
    402,99 €
    Siemens
    3
    4A
    3VA1
    -
    -
    -
    -
    SENTRON
    -
    -
    DIN Rail Mount
    -
    -
    -
    -
    Extended product life, Saves energy
    Yes
    -
    la pièce
    165,00 €
    Schneider Electric
    4
    10A
    M9F1
    Type C
    440V
    6 kA
    250V
    Multi9
    6 kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Résultats par page