最近搜索

    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.

    9003 產品顯示為 MCBs

    Better World
    HK$481.60
    Siemens
    2
    2A
    Type C
    400V
    5SY6
    6 kA
    72V
    Sentron
    6 kA
    DIN Rail Mount
    MCB
    35.2mm
    76mm
    90mm
    -
    Extended product life
    Yes
    -
    • RS庫存編號 124-3027
    • 製造零件編號 EMBH140 EMBH140
    HK$255.20
    Eaton
    1
    40A
    Type B
    230 V, 240V
    -
    10 kA
    48V
    MEMShield
    10 kA
    DIN Rail Mount
    MCB
    18mm
    75mm
    80mm
    -
    -
    -
    -
    HK$2,022.60
    Siemens
    2
    16A
    Type B
    230V
    5SV6016
    6 kA
    -
    SENTRON
    6 kA
    DIN Rail Mount
    AFDD
    90mm
    18mm
    68.5mm
    -
    Extended product life
    Yes
    -
    HK$1,831.90
    Siemens
    2
    20A
    Type C
    230V
    5SV6016
    6 kA
    -
    SENTRON
    6 kA
    DIN Rail Mount
    AFDD
    90mm
    18mm
    68.5mm
    -
    Extended product life
    Yes
    -
    • RS庫存編號 729-9052
    • 製造零件編號 C68N 2P 16A (HK)
    HK$206.08
    Schneider Electric
    2P
    16A
    -
    415V
    C68N
    6 kA
    -
    Multi 9
    6 kA
    DIN Rail Mount
    MCB
    81mm
    36mm
    76mm
    -
    -
    -
    -
    HK$288.00
    Schneider Electric
    1+N
    2A
    Type C
    230V
    Acti9 iDT40K
    4.5 kA
    -
    Acti 9
    4.5 kA
    DIN Rail Mount
    MCCB
    85mm
    18mm
    74mm
    -
    -
    Yes
    Green Premium
    • RS庫存編號 144-4948
    • 製造零件編號 MJT702
    HK$401.90
    Hager
    2
    2A
    Type C
    240 → 400V
    MJT
    6 kA
    -
    -
    6 kA
    DIN Rail Mount
    MCB
    96.1mm
    17.5mm
    85mm
    -
    -
    -
    -
    HK$199.60
    Schneider Electric
    1
    16A
    Type C
    100 → 133 V, 12 → 60 V, 220 → 240V
    iC60N
    6 kA
    12 → 48 V, 72V
    Acti 9
    6 kA
    DIN Rail Mount
    MCB
    -
    -
    78.5mm
    -
    -
    Yes
    Green Premium
    HK$551.10
    Schneider Electric
    2
    6A
    Type B
    440V
    iC60H
    10 kA
    133V
    Acti 9
    10 kA
    DIN Rail Mount
    MCB
    -
    78.5mm
    91mm
    -
    -
    Yes
    Green Premium
    Better World
    HK$851.30
    Schneider Electric
    1
    2A
    Type C
    230V
    Acti9 iDT40N
    10 kA
    -
    Acti 9
    10 kA
    DIN Rail Mount
    MCB
    18mm
    74mm
    85mm
    IDT40N
    -
    Yes
    Green Premium
    HK$859.80
    Schneider Electric
    2
    10A
    Type C
    400 V, 440 V, 100 → 130 V, 12 → 60 V, 220 → 240 V, 380 → 415V
    iC60N
    6 kA
    12 → 144V
    Acti 9
    6 kA
    DIN Rail Mount
    MCB
    -
    36mm
    -
    A9F77210
    -
    Yes
    Green Premium
    Better World
    • RS庫存編號 746-7699
    • 製造零件編號 2CDS252001R0024 S202-C2
    HK$526.40
    ABB
    2
    2A
    Type C
    400V
    S200
    6 kA
    -
    System Pro M Compact
    6 kA
    DIN Rail Mount
    MCB
    88mm
    35mm
    69mm
    S202-C2
    Designed for disassembly
    Yes
    -
    • RS庫存編號 184-9043
    • 製造零件編號 CPB1032C3
    HK$133.00
    Contactum
    3
    32A
    Type C
    415V
    -
    10 kA
    -
    -
    10 kA
    DIN Rail Mount
    MCB
    -
    -
    -
    CPB1032C3
    -
    -
    -
    • RS庫存編號 488-6943
    • 製造零件編號 2CDS251001R0325 - S201B32
    HK$168.60
    ABB
    1
    32A
    Type B
    253V
    S200
    6 kA
    72V
    System Pro M Compact
    6 kA
    DIN Rail Mount
    MCB
    69mm
    17.5mm
    88mm
    S201-B32
    -
    -
    -
    Better World
    HK$266.70
    Schneider Electric
    1+N
    10A
    Type C
    230V
    Acti9 iDT40T
    6 kA
    -
    Acti 9
    6 kA
    DIN Rail Mount
    MCB
    18mm
    74mm
    85mm
    IDT40T
    -
    Yes
    Green Premium
    • RS庫存編號 624-0440
    • 製造零件編號 278874 FAZ-C20/3
    HK$751.80
    Eaton
    3
    20A
    Type C
    400V
    -
    10 kA
    60V
    xEffect
    10 kA
    DIN Rail Mount
    MCB
    80mm
    52.5mm
    74mm
    FAZ-C20/3
    -
    -
    -
    HK$843.90
    Schneider Electric
    3
    32A
    Type C
    440 V, 12 → 133 V, 220 → 240 V, 380 → 415V
    iC60H
    10 kA
    100 → 133V
    Acti 9
    10 kA
    DIN Rail Mount
    MCB
    85mm
    54mm
    78.5mm
    -
    -
    Yes
    Green Premium
    HK$245.80
    Schneider Electric
    1
    2A
    Type C
    240 V, 415 V
    C60N
    10 kA
    72V
    Multi 9
    10 kA
    DIN Rail Mount
    MCB
    81mm
    18mm
    72mm
    Multi9 C60
    -
    Yes
    Green Premium
    Better World
    • RS庫存編號 772-1537
    • 製造零件編號 A9N61535
    HK$1,633.62
    Schneider Electric
    2
    32A
    Type C
    -
    C60H-DC
    -
    500V
    Acti 9
    -
    DIN Rail Mount
    MCB
    81mm
    -
    73mm
    -
    -
    Yes
    Green Premium
    HK$1,999.04
    Schneider Electric
    4
    20A
    Type C
    12 → 440V
    iC60N
    6 kA
    220 → 250V
    Acti 9
    6 kA
    DIN Rail Mount
    MCB
    85mm
    -
    70mm
    -
    -
    Yes
    Green Premium
    每頁顯示的結果