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    20 amp 3 pole Miniature Circuit Breaker

    5 out of 5 based on 2 reviews | Write a review
    $71.39
    Three pole DIN rail mountable miniature circuit breaker is rated at 230/400V AC supply with 6kA short circuit breaking capacity. Short-circuit protection, with C curve trip characteristic.
    SKU: ATO-MCB-3P20
    Free Shipping Worldwide
    Delivery date: 6-12 days

    Circuit Breaker Information

    • Rated Current: 20 amp
    • Rated Voltage: 230/400V AC, 50Hz
    • Number of poles: 3 pole
    • 6 kA short circuit interrupting capacity
    • 35mm DIN rail mounted
    • It can be manually switched ON and OFF as similar to normal switch if necessary
    • Thermal-magnetic overcurrent protection, short circuit protection, with C curve trip characteristic

    Technical Data

    Model ATO-NB8-633PC20
    Electrical Parameters Height 86 mm
    Width 18 mm per pole
    Mounting DIN Rail
    Rated Current (In) 20A
    Number of poles 3P
    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)

    20 amp 3 pole Miniature Circuit Breaker Dimensions

    Tips: Motor protection circuit breaker selection
    There are two features for motor as follows: Firstly, starting current is several times of rated current. Secondly, it has certain overload capacity. In order to ensure motor operation is reliable, circuit breaker should be chosen in accordance with these two features of motor.
    How to choose a motor protective circuit breaker?

    1. The long time delay action current setting value is determined by the rated current of motor.
    2. The returnable time of 6 times of long time delay action current setting value of circuit breaker is larger than the actual starting time of motor.
    3. Instantaneous action current setting value of circuit breaker: Cage motor should be 8 to 15 times as large as the rated current of releaser; winding motor should be 3 to 6 times as large as the rated current of releaser.
    Existing reviews of 20 amp 3 pole Miniature Circuit Breaker
    Good circuit breaker and arrived on time.
    Good circuit breaker and arrived on time. I installed it for heat pump as the old one was burnt. Works fine and no issues so far.
    From: Jules G. | Date: 05/11/2018
    Was this review helpful? Yes No (0/0)
    Great buy.
    I ordered this MCB as a DIN rail switch for solar panels. Very easy to install and works great. This is an easy and an inexpensive way to protect your equipment. Great buy.
    From: Lizard | Date: 30/05/2022
    Was this review helpful? Yes No (0/0)
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