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    50 amp 4 pole Miniature Circuit Breaker

    5 out of 5 based on 2 reviews | Write a review
    50 amp current rating miniature circuit breaker provides supplementary protection in the AC 50Hz circuit, 230/400V supply voltage. 4 pole version and 6kA interrupt capacity MBC, which has C curve trip characteristics.
    SKU: ATO-MCB-4P50
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    Circuit Breaker Information

    • Rated Current: 50 amp
    • Rated Voltage: 230/400V AC, 50Hz
    • Number of poles: 4 pole
    • 6 kA short circuit interrupting capacity
    • Standard 35 mm DIN rail mounting

    Technical Data

    Model ATO-NB8-634PC50
    Electrical Parameters Height 86 mm
    Width 18 mm per pole
    Mounting DIN Rail
    Rated Current (In) 50A
    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)

    50 amp 4 pole Miniature Circuit Breaker Dimensions


    4 pole Miniature Circuit Breaker Details

    Tips: Protector of the circuit breaker
    The protector of the circuit breaker is realized through various releasing equipment. The releasing equipment of the circuit breaker includes: undervoltage releasing equipment, overcurrent releasing equipment, shunt releasing equipment and so on. What’s more, the overcurrent releasing equipment can be further divided into the overload release and short-circuit release. The undervoltage release is used to monitor the fluctuation of the working pressure. When the network pressure reduces 70%~35% of the rated voltage of the network has fault, the circuit breaker can disconnect immediately. When the voltage voltage is below 35% of the rated voltage, it can prevent the circuit breaker from closing. The undervoltage release with deferred action can prevent from the voltage fluctuation caused by the dramatic rising load, so as to cause the improper disconnection of the circuit breaker. The deferred time can be 1s, 3s and 5s.
    The shunt release is used for remote control of the thermal relay to disconnect the circuit breaker. The overcurrent release is used to prevent from overload and short circuit of the load side. Generally, the circuit breaker still has the short-circuit locking function, so as to prevent the circuit breaker to be switched on after breaking the short-circuit fault and before eliminating the fault. In the short-circuit condition, the circuit breaker disconnects and the locking mechanism operates, so that the circuit breaker mechanism will be maintained at the breakage position. Before the restoration of the locking mechanism, the switching mechanism of the circuit breaker can not work, so that the circuit can not be connected.

    Existing reviews of 50 amp 4 pole Miniature Circuit Breaker
    Nice for the price.
    I used this MCB as a breaker off of my battery solar bank. It is well made and easy to use. Works great for battery disconnect. Just what I needed and good price.
    From: Pruitt | Date: 30/10/2022
    Was this review helpful? Yes No (0/0)
    Good quality and great price.
    I bought this 50 amp 4 pole MCB breaker to fix my heat press machine. Replaced the old one with this easily and my machine works well now. Well made an easy to use. I will buy more from
    From: Mccurry | Date: 28/06/2022
    Was this review helpful? Yes No (0/0)
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