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    20A 2 pole 10kA Miniature Circuit Breaker

    Miniature circuit breaker with 20 amp, 2 pole, and 230/400V AC 10 kA, are commonly use for branch circuit protection in residential, commercial and industrial fields, with B, C and D curves availble. High quality and good performance.
    SKU: ATOCLXB2-20
    Free shipping
    Delivery date: 6-12 days

    Circuit Breaker Information

    • Model: ATOCLXB2-20
    • Rated Current: 20 amp
    • Rated Voltage: 230/400V AC, 50Hz
    • Number of pole: 2 poles
    • 10 kA short circuit breaking capacity
    • Compliance with IEC standard
    • Three-level trip characteristics for short circuit and overload protection for different applications, catagorized 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 Dimensions
    circuit breaker dimension
    Tips: Arc extinguishing principle of the circuit breaker
    Arc extinguishing is also one of the important applications of the circuit breaker, because arc not only damages the equipment circuit, but also affects human safety. Generally, there are four conventional arc extinguishing means, including the mechanical arc extinguishing, magnetic quenching and so on.

    1. Mechanical arc extinguishing
      The arc is stretched long rapidly through the limitation equipment. Such a means is mostly used in the switch equipment.
    2. Magnetic quenching
      Under an action of the magnetic field generated by the magnetic coil connected with the contact head in series, the arc is pulled long because of the electromagnetic force. It will be blown into the arc extinguishing cover constituted by the solid medium to contact with the solid medium. Then the arc is cooled and extinguished.
    3. Narrow slit (longitudinal slit) arc extinguishing
      Under the electrodynamic force of the magnetic field formed by the arc, the arc will be pulled long and enter into the narrow (longitudinal) slit of the arc extinguishing cover. Several longitudinal slits will cut the arc into several segments and contact with the solid medium directly. As a result, the arc is extinguished soon. Such a structure is mainly used for the AC contactor.
    4. Grid-plate arc extinguishing
      When the contact heads separate, the generated arc will be pushed into a group of metal grids, so as to be cut into several segments under the electrodynamic force. Every piece of mutually insulated metal grid is equivalent to an electrode. Therefore, there are many pressure reductions of positive and negative poles. As to the AC arc, there will be a dielectric strength of 150V~250V approaching to the negative pole when the arc exceeds zero, so that the arc will be extinguished instead of continuing to maintain. Therefore, AC apparatus usually employs the grid-plate arc extinguishing.
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