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    40A 1 pole 5kA Miniature Circuit Breaker

    Low cost miniature circuit breaker is 35mm DIN rail mounted and complete range of UL 1077 listed, 40A rated current at 277/480V AC voltage, 5kA short circuit breaking capacity. The 1 pole supplementary protector offers a compact solution for protection requirements.
    SKU: ATO-MCB-1P40
    This product has a minimum quantity of 30
    Free Shipping Worldwide
    Delivery date: 6-12 days

    Circuit Breaker Information

    • Model: ATOCLXB1-40
    • Rated Current: 40 amp
    • Rated Voltage: 277/480V AC, 50Hz/ 60Hz
    • Number of poles: single pole
    • UL1077 Recognized supplemental protective device
    • 5 kA short circuit interrupting capacity
    • The miniature supplementary protector offer thermal magnetic trip protection according to B, C, and D characteristics

    Technical Data

    Standard Certifications IEC UL1077
    Electrical Parameters Height 86 mm
    Width 18 mm per pole
    Mounting DIN Rail
    Rated Current (In) 1A, 2A, 3A, 4A, 6A, 10A, 13A, 16A, 20A, 25A, 32A, 40A, 50A, 63A (Available)
    Number of poles 1P, 2P, 3P, 4P (Available)
    Rated Voltage (Ue) (Optional) 240/415V or 230/400V 277/480V
    Rated Insulation Voltage (Ui) 500V
    Reted Frequency 50Hz/60Hz
    Short Circuit Interrupting Capacity (Optional) 6/10KA 5KA
    Trip Characteristic (Optional) B Curve (3-5In) B Curve (4In)
    C Curve (5-10In) C Curve (7In)
    D Curve (10-20In) D Curve (14In)
    Mechanical Parameters Electrical Life 8000 times
    Mechnical Life 10000 times
    Protection Degree IP20
    Calibration Temperature 30
    Operating Temperature -5℃~+40℃
    Storage Temperature -25℃~+70℃
    Tightening Torque 22 Ib-in (2 Nm)
    Terminal Size Acceptability–Min/Max 2.5 mm(12 AWG) / 25mm(3 AWG)

    Circuit Breaker Dimension (Unit: mm)

    circuit breaker dimensionTips: Gas pressure reduction of SF6 circuit breaker, how to solve?
    SF6 circuit breaker has the function of monitoring the changes of gas pressure through SF6 gas density relay. When the SF6 pressure drops to the first alarm value, the density relay is activated to generate the signal of "SF6 low pressure". The following operations should be performed:

    1. Check the pressure gage to see whether there is an air leakage or signal generated is correct or not. If there is a serious leakage of SF6 gas with irritating smell that makes people uncomfortable, anti-poisoning measures should be taken accordingly.
    2. If it is the pressure decrease caused by long term operation, rather than air leakage, an electric air injection should be carried out by specialists. If an air leakage occurs and SF6 gas pressure drops to the second alarm value, the density relay will be activated to generate signals such as "trip locked" or "sub-trip locked". If the circuit breaker is not tripped, an application of stopping the operation of circuit breaker should be sent to the dispatcher and measures should be taken as follows:
      a. Remove the operating fuse and put up a warning board.
      b. Switch the failed circuit breaker to a backup bus or interbus, and provide the power supply from bus tied or interbus tied circuit breaker.
      c. Try to have an electric air injection, if electricity not available, arrange an air injection after electric load is discharged followed by power-off.
      d. The circuit breaker with serious lack of gas can only be used as isolation switch. If it cannot be replaced by bus circuit breakers or interbus circuit breaker, this circuit breaker should be cut off before electric load is discharged to reduce the current of circuit breaker to zero.
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