(0) Shopping cart
You have no items in your shopping cart.
Shopping Categories

    40 amp 3 pole Miniature Circuit Breaker

    5 out of 5 based on 2 reviews | Write a review
    Economical price 3 pole 40 amp DIN rail mountable miniature circuit breaker is rated at 230/400V AC supply with 6kA short circuit breaking capacity. Short-circuit protection and overload protection, with C curve trip characteristic, DIN rail mounted.
    SKU: ATO-MCB-3P40
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    Circuit Breaker Information

    • Rated Current: 40 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-NB8-633PC40
    Electrical Parameters Height 86 mm
    Width 18 mm per pole
    Mounting DIN Rail
    Rated Current (In) 40A
    Number of poles 3P
    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)

    40 amp 3 pole Miniature Circuit Breaker Dimensions


    3 pole Miniature Circuit Breaker Details

    Tips: How to select a miniature circuit breaker

    1. Determine the number of poles of the miniature circuit breaker according to the number of lines to be protected. For example, the general household electricity is single-phase electricity, and the circuit consists of a neutral wire and a live wire. If both lines need to be protected, select two poles. If the neutral line does not need to be protected, choose a single pole.
    2. Determine the amperage of the mini circuit breaker according to the line load. For example, if the load capacity of the line is 20A and the rated working current of the electrical appliance is 10A, the circuit breaker selection should be> 10A, <20A.
    3. Determine the type of instantaneous protection according to the resistance type of electrical appliances in the loop. There are three types of instantaneous protection, and the corresponding current protection multiples are B: 3~5In, C: 5~10In, D10~14In (In is the rated current). If it's just an incandescent lamp, you can choose type B. Choose type C for general electricity use, and type D for air conditioning protection.
    Existing reviews of 40 amp 3 pole Miniature Circuit Breaker
    Great for price.
    This 3 pole miniature circuit breaker takes up little space. Works great for interconnecting solar panel junction boxes. It is easy to install and works very well. Good performance and great for the price.
    From: Alexander | Date: 28/10/2022
    Was this review helpful? Yes No (0/0)
    This miniature circuit breaker is great.
    I need a circuit breaker between the charge controller and the battery, so I ordered this miniature circuit breaker. It works great. Well-made and easy to use. I would recommend this MCB, and pricing is fair.
    From: Paris | Date: 28/04/2022
    Was this review helpful? Yes No (0/0)
    Load more reviews...
    Write your review for 40 amp 3 pole Miniature Circuit Breaker
    • Only registered users can write reviews
    • Bad
    • Excellent