MCCBs | Moulded Case Circuit Breakers | RS
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    MCCBs

    Molded Case Circuit Breakers (MCCBs) are protective devices used to interrupt and protect electrical circuits from overcurrent and short-circuits. MCCBs are electrical devices that can be used to protect a wide range of electrical systems and equipment.

    They are commonly used in low and medium-voltage applications and can handle higher levels of current than Miniature Circuit Breakers (MCBs). MCCBs typically have a rated current of 10 amps to 2,500 amps, and a breaking capacity of up to 200 kA.

    How does an MCCB work?

    An MCCB consists of a current-carrying bimetallic strip, a magnetic trip element, and a mechanical latching mechanism. When the current flowing through the MCCB exceeds the set limit, the bimetallic strip heats up and bends, causing the latch to release and trip the breaker. The magnetic trip element senses the magnetic field produced by a high fault current and trips the breaker.

    Difference between an MCB and an MCCB

    MCBs are miniature circuit breakers designed to protect low-current circuits up to 125 amps. They typically have a breaking capacity of up to 10 kA and are designed to trip quickly in the event of a short circuit or overload. MCBs are commonly used in residential and commercial buildings to protect individual circuits, such as lighting and power circuits.

    MCCBs, on the other hand, are designed to handle higher levels of current (depending on which current rating you buy) and can protect larger electrical systems and equipment. They have a higher breaking capacity than MCBs.

    Typical applications

    MCCBs are commonly used in a wide range of applications, including:

    • Industrial plants: MCCBs are used to protect motors, transformers, and other equipment in industrial plants.
    • Data centres: MCCBs are used to protect power distribution systems in data centres.
    • Commercial buildings: MCCBs are used to protect lighting and power circuits in commercial buildings.
    • Hospitals: MCCBs are used to protect critical equipment in hospitals, such as MRI machines and X-ray machines.

    8981 產品顯示為 MCCBs

    ABB
    SACE Tmax T
    T4N
    3
    320A
    70 kA
    690V
    -
    Fixed
    103.5mm
    105mm
    205mm
    -
    -
    -
    Schneider Electric
    -
    -
    3
    0 → 160A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    Yes
    Green Premium
    Schneider Electric
    ComPacT NSX
    ComPacT NSX160F
    3
    125A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    Yes
    Green Premium
    Eaton
    -
    -
    3
    250A
    80 kA
    690V
    -
    Fixed
    105mm
    184mm
    149mm
    -
    -
    -
    Legrand
    DNX3
    DNX3
    1
    6A
    4.5 kA
    230V
    -
    DIN Rail Mount
    -
    -
    -
    -
    -
    -
    Schneider Electric
    ComPacT
    NSX
    3
    400A
    85 kA
    690V
    -
    Fixed
    255mm
    140mm
    110mm
    -
    -
    -
    Eaton
    xEnergy
    -
    3
    100A
    25 kA
    440V
    -
    Fixed
    88mm
    90mm
    88mm
    -
    -
    -
    Schneider Electric
    ComPacT NSX
    C10F
    4
    100A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    -
    -
    ABB
    SACE Tmax XT
    XT5S
    4
    630A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    -
    -
    Schneider Electric
    Compact
    -
    4
    800A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    -
    -
    Schneider Electric
    Compact
    NSXm
    4
    100A
    16 kA
    690V
    -
    DIN Rail Mount
    108mm
    80mm
    137mm
    -
    Yes
    Green Premium
    Schneider Electric
    PowerPact
    BGL3
    3
    50A
    -
    -
    -
    -
    -
    -
    -
    -
    Yes
    Green Premium
    Schneider Electric
    ComPacT
    NSX
    3
    400A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    -
    -
    Schneider Electric
    ComPacT New Generation
    ComPacT NSX100N
    3
    63A
    50 kA
    690V
    -
    Fixed
    -
    105mm
    86mm
    -
    Yes
    Green Premium
    Schneider Electric
    Compact
    NSXm
    4
    160A
    36 kA
    690V
    -
    DIN Rail Mount
    108mm
    80mm
    137mm
    -
    Yes
    Green Premium
    Schneider Electric
    ComPacT New Generation
    NSX160N
    3
    160A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    -
    -
    Schneider Electric
    ComPacT New Generation
    BGL160
    1
    15A
    65 kA
    -
    -
    Screw Mount
    -
    -
    -
    -
    -
    -
    Schneider Electric
    Compression Lug
    -
    4
    -
    -
    -
    -
    Cable Mount
    -
    -
    -
    -
    Yes
    Green Premium
    ABB
    XT2S
    1SDA06
    3
    50A
    -
    -
    -
    Fixed
    -
    -
    -
    -
    -
    -
    Siemens
    SENTRON
    3VA1
    4
    125A
    36 kA
    -
    -
    Fixed
    -
    -
    -
    Extended product life, Saves energy
    Yes
    -
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