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    63 amp 4 pole Miniature Circuit Breaker

    5 out of 5 based on 2 reviews | Write a review
    Miniature circuit breaker with 4-pole, 63 ampere current rating, excellent breaking capability of 6kA at 230/400V AC voltage, and C curve trip characteristic can meet the different needs of applications.
    SKU: ATO-MCB-4P63
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    Circuit Breaker Information

    • Rated Current: 63A
    • Rated Voltage: 230/400V AC, 50Hz
    • Number of poles: 4 pole
    • 6 kA short circuit breaking capacity
    • Accordance with IEC standard
    • Possibility for locking the toggle in ON or OFF position
    • Trip-free design, breaker cannot be defeated by holding the handle in the ON position
    • C curve trip characteristic give you the ability to configure the exact protection scheme you required

    Technical Data

    Model ATO-NB8-634PC63
    Electrical Parameters Height 86 mm
    Width 18 mm per pole
    Mounting DIN Rail
    Rated Current (In) 63A
    Number of poles 4P
    Rated Voltage (Ue) 230/400V
    Rated Insulation Voltage (Ui) 500V
    Dielectric Test Voltage 2000V
    Rated 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)

    63 amp 4 pole Miniature Circuit Breaker Dimensions


    4 pole Miniature Circuit Breaker Details

    Tips: AC circuit breaker for DC circuit
    The AC circuit breaker can be derived to protect the DC circuit. However, the changes of the following three points should be paid attentions:

    1. Overload long time delay protection: When the thermal type (bimetallic element) is used for the overload long time delay protection, its action source is I2R. The effective value of AC current is equivalent to the average DC value. Therefore, it can be used without any modification. However, as to the heavy current specification and the secondary side current of the current transformer is used for heating, it can not be used because the instrument transformer is unable to be used for the DC current.
    2. As to the accessories of the circuit breaker, such as the shunt release, under-voltage release, electric operating mechanism and so on, the shunt and under-voltage are both in the voltage circuit. Once the voltage value is consistent, those used for the AC system can also be used for DC system without making any modification. The auxiliary and alarm contacts can be used for both AC and DC currents. The electric operating mechanism has to be redesigned if it is used for DC current.
    3. Unlike the AC current, the DC current has no characteristic of zero crossing point. It is difficult in breaking the DC short-circuit current (even the fault current with low multiplies) and extinguishing the arc. Therefore, the wiring must employ the dipolar or tripolar series connection to increase the fractures, so that various fractures will be able to sustain some arc energy.
    Existing reviews of 63 amp 4 pole Miniature Circuit Breaker
    Good so far.
    This miniature circuit breaker protects my solar controller from damage by disconnecting solar power panel until battery connection is made. Good so far. I will buy this MCB again.
    From: Juan | Date: 30/10/2022
    Was this review helpful? Yes No (0/0)
    I am happy with this order.
    It is a nice 63 amp 4 pole miniature circuit breaker and it works as designed. I used it as a part of the solar charging system that I built into my RV. Everything works great. I am happy with this order.
    From: Maria | Date: 28/06/2022
    Was this review helpful? Yes No (0/0)
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