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    40 amp 4 pole Miniature Circuit Breaker

    5 out of 5 based on 1 reviews | Write a review
    $83.29
    4 pole miniature circuit breaker with 40A current rating and C trip curve. The 6kA breaking capacity mini circuit breaker, mount on a standard 35mm DIN rail, makes it ideal for commercial and industrial IEC applications.
    SKU: ATO-MCB-4P40
    Free Shipping Worldwide
    Delivery date: 6-12 days

    Circuit Breaker Information

    • Rated Current: 40 amp
    • Rated Voltage: 230/400V AC, 50Hz
    • Number of poles: 4 pole
    • 6 kA short circuit breaking capacity
    • Excellent breaking capability for its compact size
    • Compliant  with IEC standard
    • Trip-free design, breaker cannot be defeated by holding the handle in the ON position
    • C curve trip characteristic gives you the ability to configure the exact protection scheme you required

    Technical Data

    Model ATO-NB8-634PC40
    Electrical Parameters Height 86 mm
    Width 18 mm per pole
    Mounting DIN Rail
    Rated Current (In) 40A
    Number of poles 4P
    Rated Voltage (Ue) 230/400V
    Rated Insulation Voltage (Ui) 500V
    Dielectric Test Voltage 2000V
    Reted Frequency 50Hz
    Short Circuit Interrupting Capacity 6KA
    Trip Characteristic C Curve (5-10In)
    Rated Short-Circuit Breaking Capacity 6000A
    Operating Short-Circuit Breaking Capacity 6000A
    Mechanical Parameters Electrical Life 10000 times
    Mechanical Life 20000 times
    Flame Retardant Grade V0
    Protection Degree Direct installation: IP20B
    Installed in the distribution box: IP40B
    Calibration Temperature 30℃
    Operating Temperature -35℃~+70℃
    Storage Temperature -35℃~+85℃
    Tightening Torque 2 N.m
    Max. Tolerable Torque 2.5 N.m
    Terminal Size Acceptability–Min/Max 1 mm2 / 25mm2
    Wire Insertion Depth 13mm

    Circuit Breaker Dimension (Unit: mm)

    40 amp 4 pole Miniature Circuit Breaker Dimensions

    Tips: Main parameters of the circuit breaker

    1. Rated voltage: The rated voltage of the main contact of the circuit breaker, it is the voltage value guaranteeing the long-term normal operation of the contact terminal of the contactor.
    2. Rated current: Rated current of the main contact terminal of the circuit breaker, it is the current value guaranteeing the long-term normal operation of the contact terminal of the contactor.
    3. Tripping current: It is the set value of the action of the current release. When the circuit is short-circuit or the overload condition is serious, the load current is higher than the tripping current, the main contact terminal of the circuit breaker disconnects.
    4. Overload protection current, time curve: it is the inverse-time characteristic curve. A higher overload current leads to a shorter action time of the thermal release.
    5. Breaking capacity: Two indexes of rated limit short-circuit breaking capacity Icu and rated operation short-circuit breaking capacity Ics.
      The rated limit short-circuit breaking capacity Icu is the limit parameter of the breaking capacity of the circuit breaker. After breaking several short-circuit faults, the breaking capacity of the circuit breaker declines.
      The rated operation short-circuit breaking capacity Ics is a kind of breaking index of the circuit breaker. After breaking several short-circuit faults, it can still be guaranteed to have normal operation.
    Existing reviews of 40 amp 4 pole Miniature Circuit Breaker
    Nice 40 amp 4 pole MCB.
    I used this miniature circuit breaker for solar wiring before my MPPT. It seems to be doing the job. Very nice and good quality. Good value for the money. I will recommend it to my neighbors and friends.
    From: Stefan | Date: 28/06/2022
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