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    20 amp 2 pole Miniature Circuit Breaker

    5 out of 5 based on 1 reviews | Write a review
    $62.69
    Factory price MCB Miniature circuit breaker for sale, with 20 amp, 2 pole, and 230/400V AC, 6 kA rated short-circuit breaking capacity. This micro circuit breaker with C curve trip characteristic, is commonly used for branch circuit protection in residential, commercial, and industrial fields.
    SKU: ATO-MCB-2P20
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    Double pole 20 amp miniature circuit breaker (MCB) is a switch used in residential and commercial electrical systems for protecting circuits from overloads and short circuits. This C20 mini circuit breaker provides reliable protection by automatically disconnecting the circuit if the current exceeds the safe limit, preventing potential damage to electrical equipment and wiring.

    Double Pole MCB Breaker Information

    • Rated Current: 20 amp
    • Rated Voltage: 230/400V AC, 50Hz
    • Number of poles: 2 poles
    • 6 kA rated short-circuit breaking capacity
    • Compliant with IEC standard
    • C curve trip characteristic
    • With overload protection and short circuit protection function

    Technical Data

    Model ATO-NB8-632PC20
    Rated Current 20A
    Rated Voltage 230/400V
    Frequency 50Hz
    Number of Poles 2P
    Mechanical Life 20000 Times
    Electrical Life 10000 Times
    Rated Short-Circuit Breaking Capacity 6000A
    Operating Short-Circuit Breaking Capacity 6000A
    Rated Impulse Withstand Voltage (1.2/50) 6kV
    Dielectric Test Voltage 2000V (50Hz, 1 min)
    Heat & Humidity Resistance 28 Cycles
    Vibration Resistance No Obvious Vibration and Impact
    Terminal Block Terminal Block Type Pillar Terminal Block
    Min. Terminal Size Acceptability 1mm2
    Max. Terminal Size Acceptability 25mm2
    Standard Connection Torque 2 N.m
    Max. Tolerable Torque 2.5 N.m
    Wire Insertion Depth 13mm
    Reference Temperature 30℃
    Operating Temperature -35℃~+70℃
    Storage Temperature 35℃~+85℃
    Applicable Altitude 2000m
    Tripping Mode Thermal Magnetic Trip
    Electromagnetic Tripping Type Type C (5In-10In)
    Shell Flame Retardant Grade V0
    Wire Entry Method Both Upper and Lower
    Installation Method TH35-7.5 Standard Rail
    Protection Level Direct Installation IP20B
    Installed in the Distribution Box IP40B


    Double Pole MCB Breaker Dimensions (Unit: mm)

    20 amp 2 pole Miniature Circuit Breaker Dimensions

    Details

    2 pole Miniature Circuit Breaker Details

    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 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.

    Types of Circuit Breakers

    In this video, we'll take a closer look at the meaning behind these abbreviations and explain the types of circuit breakers they represent. By understanding the different types of circuit breakers on the market, you can make an informed decision and choose the right type for your specific requirements, thereby enhancing the protection of your electrical infrastructure.

    Isolator vs Circuit Breaker

    Although isolators and circuit breakers have similar functions in a circuit, they are two separate entities. This video explains you the difference between the two devices in terms of working, features, operation, affordability, etc. You can choose between them based on your specific requirements.

    Existing reviews of 20 amp 2 pole Miniature Circuit Breaker
    The circuit breakers work perfect.
    Fast delivery and well packed. I bought three of these for house use. The circuit breakers look very solid. Installation is simple on DIN rail. Work perfect for me.
    From: Tim | Date: 07/11/2018
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