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    250A DC Circuit Breaker, 1/2/3/4 Pole

    5 out of 5 based on 1 reviews | Write a review
    Reasonable price and high quality 250A DC circuit breaker for sale. Electrical circuit breaker is available for installation in standard busbars. High speed DC circuit breaker often used in transformers with strict voltage requirements and frequent shifting.
    SKU: ATO-DCCB-250A
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    250 amp circuit breaker has overload long delay protection and short-circuit instantaneous protection functions. The protection level of PV DC circuit breaker is IP20.


    • Extremely high breaking capacity and current limiting characteristics.
    • Available for installation in standard busbars.
    • Dual function terminals on top and bottom sides (lifting type / open type).
    • Optionally fixed to the bus bar on the top or bottom side.
    • With isolation function, can be used as the main switch.
    • Wiring terminal guidance to prevent mis-wiring.


    Electrical Parameter Model FXBN1/BM1-250A
    Current 250A
    Rated Voltage DC 250V, 500V, 750V, 1000V
    Current Shell Frame 250A
    Numbers of Pole 1 pole, 2 pole, 3 pole, 4 pole
    Breaking Capacity 25 KA
    Rated Insulation Voltage 1000V
    Rated Impulse Withstand Voltage 8 kV
    Total Break Time 20 ms
    Installation Location any location
    Allowable Ambient Temperature -25 ℃ ~ 50 ℃
    Protection Level IP20
    Avaliable with Accessories auxiliary, alarm, diverter, manual operation, elecrtic operation, mechanical interlock
    Flying Arc Distance ≥50 mm
    Instantaneous Action Valve 12 ln
    Installation Method fixed, insertion type
    Standard IEC60947-2x IEC60947-K GB14048.R GB14048.2
    Machinery Parameter Mounting Method IEC standard track 35 mm
    Enclosure Protection Level IP20
    Dual Function Terminals on Both Sides open type / lifting type
    Terminal Protection finger touch and hand touch safety
    Terminal Wiring Capacity 1-25 mm²
    Termianal Screw Tightening Torque 2-2.4 Nm
    Bus Bar Thickness 0.8-2 mm
    Mounting Angle functionaity is independent of location

    Dimension (Unit: mm)

    160A to 250A DC circuit breaker dimension

    Note: If you need copper busbar parts, please contact us.

    Wiring Diagram

    Wiring diagram DC circuit breaker


    250A DC Circuit Breaker Details

    Tips What Is the Difference Between DC Power and AC Power?

    AC stands for alternating current. AC voltage alternates direction, changing from a positive voltage to a negative voltage and back. The number of times it changes per second is measured in hertz (Hz). In the United States, AC power is 60 Hz, so it alternates 60 times every second. DC stands for “direct current”, which does not alternate. DC voltage always moves in one direction. A solar panel produces DC power, but your home needs AC power. This is why you need an inverter or microinverter to convert DC to AC.

    Existing reviews of 250A DC Circuit Breaker, 1/2/3/4 Pole
    Suit for my system
    ATO always make good quality products, and the same goes for their DC circuit breakers. It was perfectly suited for the grid-input breaker/cut-off for my solar system.
    From: Harless | Date: 15/12/2022
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