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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.

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    210 産品
    單價
    Brand
    Number of Poles
    Current Rating
    Tripping Characteristics
    Rated AC Voltage
    Series
    Breaking Capacity at Maximum Voltage Rating
    Rated DC Voltage
    Range
    Breaking Capacity
    Mounting Style
    Circuit Breaker Type
    Length
    Width
    Depth
    Model Number
    Better World Claim
    Better World Product
    Better World Verification
    產品詳述
    單價
    Brand
    Number of Poles
    Current Rating
    Tripping Characteristics
    Rated AC Voltage
    Series
    Breaking Capacity at Maximum Voltage Rating
    Rated DC Voltage
    Range
    Breaking Capacity
    Mounting Style
    Circuit Breaker Type
    Length
    Width
    Depth
    Model Number
    Better World Claim
    Better World Product
    Better World Verification
    HK$368.00
    Lovato
    2
    20A
    Type D
    230 V, 400V
    P1MB
    10 kA
    80V
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    36mm
    80mm
    -
    -
    -
    -
    • RS庫存編號 825-5949
    • 製造零件編號 P1MB4PB63
    HK$1,196.21
    Lovato
    4
    63A
    Type B
    230 V, 400V
    P1MB
    10 kA
    -
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    72mm
    80mm
    -
    -
    -
    -
    HK$457.20
    Lovato
    2
    6A
    Type C
    230 V, 400V
    P1MB
    10 kA
    80V
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    36mm
    80mm
    -
    -
    -
    -
    • RS庫存編號 825-5835
    • 製造零件編號 P1MB3PC06
    HK$689.70
    Lovato
    3
    6A
    Type C
    230 V, 400V
    P1MB
    10 kA
    -
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    54mm
    80mm
    -
    -
    -
    -
    HK$240.60
    Lovato
    1
    1A
    Type B
    230V
    P1MB
    10 kA
    60V
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    18mm
    80mm
    -
    -
    -
    -
    HK$467.80
    Lovato
    2
    2A
    Type B
    230 V, 400V
    P1MB
    10 kA
    80V
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    36mm
    80mm
    -
    -
    -
    -
    HK$139.40
    Lovato
    1
    10A
    Type C
    230V
    P1MB
    10 kA
    60V
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    18mm
    80mm
    -
    -
    -
    -
    HK$493.19
    Lovato
    2
    63A
    Type C
    230 V, 400V
    P1MB
    10 kA
    80V
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    36mm
    80mm
    -
    -
    -
    -
    • RS庫存編號 825-5974
    • 製造零件編號 P1MB4PC63
    HK$1,184.20
    Lovato
    4
    63A
    Type C
    230 V, 400V
    P1MB
    10 kA
    -
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    72mm
    80mm
    -
    -
    -
    -
    HK$154.93
    Lovato
    1
    32A
    Type C
    230V
    P1MB
    10 kA
    60V
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    18mm
    80mm
    -
    -
    -
    -
    • RS庫存編號 825-5927
    • 製造零件編號 P1MB4PB16
    HK$1,036.80
    Lovato
    4
    16A
    Type B
    230 V, 400V
    P1MB
    10 kA
    -
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    72mm
    80mm
    -
    -
    -
    -
    • RS庫存編號 825-5813
    • 製造零件編號 P1MB3PB40
    HK$715.44
    Lovato
    3
    40A
    Type B
    230 V, 400V
    P1MB
    10 kA
    -
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    54mm
    80mm
    -
    -
    -
    -
    • RS庫存編號 248-5616
    • 製造零件編號 P1MB1MC10
    HK$444.30
    Lovato
    1+N
    10A
    Type C
    230V
    -
    -
    -
    P1
    -
    DIN Rail Mount
    -
    -
    -
    -
    -
    -
    -
    -
    HK$1,173.30
    Lovato
    2
    125A
    Type C
    230 V, 400V
    P2MB
    10 kA
    60V
    ModuLo
    -
    DIN Rail Mount
    MCB
    85mm
    54mm
    80mm
    -
    -
    -
    -
    • RS庫存編號 825-5891
    • 製造零件編號 P1MB3PD40
    HK$643.90
    Lovato
    3
    40A
    Type D
    230 V, 400V
    P1MB
    10 kA
    -
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    54mm
    80mm
    -
    -
    -
    -
    HK$368.00
    Lovato
    2
    10A
    Type C
    230 V, 400V
    P1MB
    10 kA
    80V
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    36mm
    80mm
    -
    -
    -
    -
    • RS庫存編號 825-6018
    • 製造零件編號 P1MB4PD50
    HK$1,076.60
    Lovato
    4
    50A
    Type D
    230 V, 400V
    P1MB
    10 kA
    -
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    72mm
    80mm
    -
    -
    -
    -
    • RS庫存編號 825-5794
    • 製造零件編號 P1MB3PB10
    HK$643.90
    Lovato
    3
    10A
    Type B
    230 V, 400V
    P1MB
    10 kA
    -
    ModuLo
    -
    DIN Rail Mount
    MCB
    86.5mm
    54mm
    80mm
    -
    -
    -
    -
    • RS庫存編號 188-1660
    • 製造零件編號 P1MBUH3PC20
    HK$1,378.42
    Lovato
    3
    20A
    Type C
    400V
    -
    10 kA
    -
    -
    -
    DIN Rail Mount
    MCB
    54mm
    76mm
    116mm
    P1MBUH3PC20
    -
    -
    -
    • RS庫存編號 248-5617
    • 製造零件編號 P1MB1MC20
    HK$444.30
    Lovato
    1+N
    20A
    Type C
    230V
    -
    -
    -
    P1
    -
    DIN Rail Mount
    -
    -
    -
    -
    -
    -
    -
    -
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