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    50A 4 pole 5kA Miniature Circuit Breaker

    50 amp current rating miniature circuit breaker is UL1077 recognized, providing supplementary protection in the AC 50/60Hz circuit, 277/480V supply voltage. 4 pole version and 5kA interrupt capacity MBC, which has three trip characteristics of B, C and D curves to select.
    SKU: ATO-MCB-4P50
    This product has a minimum quantity of 30
    Free Shipping Worldwide
    Delivery date: 6-20 days

    Circuit Breaker Information

    • Model: ATOCLXB4-50
    • Rated Current: 50 amp
    • Rated Voltage: 277/480V AC, 50Hz/ 60Hz
    • Number of poles: 4 pole
    • 5 kA short circuit interrupting capacity
    • Meet the requirements of the UL 1077 standard for safety
    • Standard 35 mm DIN rail mounting
    • Thermal-magnetic overcurrent protection, three levels of short circuit protection, categorized by B, C and D curves

    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 mm2(12 AWG) / 25mm2(3 AWG)

    Circuit Breaker Dimension

    circuit breaker dimensionTips: 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.

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