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    50 amp 3 pole Miniature Circuit Breaker

    5 out of 5 based on 2 reviews | Write a review
    $82.29
    Economical price 50 amp 3 pole miniature circuit breaker (MCB) for sale, compliance with IEC standards, is a protective switch designed to ensure safety and reliability in electrical installations. This mini MCB provides reliable protection against overloads and short circuits, effectively preventing damage to electrical equipment and wiring.
    SKU: ATO-MCB-3P50
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    50 amp 3 pole miniature circuit breaker (MCB) is an electrical switch designed to safeguard circuits from overcurrent and short circuit damage. This mini circuit breaker offers short circuit, overload, and circuit interruption protection, working frequency of 50-60Hz.

    3 Pole MCB Breaker Features

    • Rapid arc extinguishing system: This 3P mini circuit breaker eliminates line danger, can sense even small currents, and provides sensitive protection.
    • Thermosetting shell: 3 pole MCB breaker uses thermosetting plastic, which solidifies or has insoluble characteristics under heat or other conditions.
    • Sealed terminal: 50 amp miniature circuit breaker has a built-in sealed terminal, which is rust-proof and convenient, and meets certification standards.
    • Ergonomic handle: The handle is comfortable to operate, has high segmentation capacity, and is sensitive to action.

    Technical Data

    Model ATO-BY6-63-3P-50A
    Number of Poles 3P
    Rated Frequency 50-60Hz
    Frame Grade Current 63A
    Rated Current(In) 50A
    Rated Insulation Voltage 400V
    Rated Impulse Withstand Voltage (Uimp) 4000KV
    Rated Short-circuit Capacity(Inc) 3000-6000KA
    Producible Leakage Protection Type AC type
    Electrical Characteristics Short Circuit Protection, Overload Protection, Power Failure Protection
    Electrical Life 10000
    Mechanical Life 10000
    Protection Level IP20
    Comply with the Standard GB/T10963.1-2020 IEC60898-1


    3 Pole MCB Breaker Dimensions (Unit: mm)

    1 pole miniature circuit breaker dimension

    3 Pole MCB Breaker Wiring

    MCB miniature circuit breaker wiring

    How to Choose a Miniature Circuit Breaker for Home?

    Rated Current Copper Core Wire Load Power Applications
    1~5A <1mm ≤1100W Low-power Equipment
    6A ≥1mm ≤1320W Lighting
    10A ≥1.5mm ≤2200W Lighting
    16A ≥2.5mm ≤3520W Lighting, Sockets, 1~1.5 hp Air Conditioner
    20A ≥2.5mm ≤4400W Lighting, Sockets, 1~1.5 hp Air Conditioner
    25A ≥4mm ≤5500W Lighting, Sockets, 1~2.5 hp Air Conditioner
    32A ≥6mm ≤7040W Sockets, 3 hp Air Conditioner, 6 kW Water Heater
    40A ≥10mm ≤8800W 8 kW Instant Water Heater, Main Power Switch
    50A ≥10mm ≤11000W Main Power Switch
    63A ≥16mm ≤13200W Main Power Switch

    Tips: Why do you need a 50 amp 3 pole miniature circuit breaker?

    A 50 amp 3 pole miniature circuit breaker (MCB) is essential for protecting three-phase electrical systems from overloads and short circuits. It’s commonly used in industrial and commercial applications where balanced power distribution is critical. With three poles, the MCB simultaneously disconnects all three phases, ensuring safety and preventing equipment damage during faults. The 50 amp rating makes it suitable for high-power machinery, HVAC systems, and large motors, providing reliable protection without frequent nuisance tripping. This type of micro circuit breaker also enhances system stability and helps prevent costly downtime by isolating faulty circuits efficiently. Its compact size saves panel space while meeting safety standards. Whether you’re managing industrial automation equipment or large-scale electrical installations, a 50 amp 3 pole mini circuit breaker is vital for safeguarding your equipment and ensuring smooth, uninterrupted operation.

    Types of Circuit Breakers

    In this video, we'll take a closer look at the meaning behind these abbreviations and explain the types of circuit breakers they represent. By understanding the different types of circuit breakers on the market, you can make an informed decision and choose the right type for your specific requirements, thereby enhancing the protection of your electrical infrastructure.

    Isolator vs Circuit Breaker

    Although isolators and circuit breakers have similar functions in a circuit, they are two separate entities. This video explains you the difference between the two devices in terms of working, features, operation, affordability, etc. You can choose between them based on your specific requirements.

    Existing reviews of 50 amp 3 pole Miniature Circuit Breaker
    This MCB works great.
    I ordered this miniature circuit breaker because I wanted safe switch for occasional use inside a solar panel. The MCB is as described and shown including the short piece of DIN rail and two screws. For my purposes it works well but time will tell.
    From: Marcus | Date: 28/10/2022
    Was this review helpful? Yes No (0/0)
    High quality MCB.
    I bought this 50 amp 3 pole miniature circuit breaker as a quick disconnect for my solar panels. It functions perfectly, works as designed. High quality MCB that deserves 5 stars.
    From: Della | Date: 30/05/2022
    Was this review helpful? Yes No (0/0)
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