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    400A DC Reversing Contactor, 2 pole, 12V/24V/48V

    5 out of 5 based on 3 reviews | Write a review
    2 pole reversing contactor has been designed for direct current load, 2NO and 2NC ( DPST-NO, DPST-NC) contact form, rated load current is 400A. IP 50 protection, easy and quick installation, manufacturer direct sale.
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    Delivery date: 10-20 days

    ATO ASW400 reversing contactor is used to change the direction of rotation in alternating current motors, start them gently and to monitor their load. Widely used in auto electric winch, telecommunication equiment, engineering machinery and other electric control system.


    • 400 amps rated load current of contact circuit.
    • 2NO and 2NC contact form.
    • 12V, 24V, 48V DC coil rated voltage for selection.
    • Main contact voltage drop at 100A, not above 100mV.
    • Mechanical life up to 300 thousand times.

    400A DC Reversing Contactor Specifications

    Basics Model ATO-ASW400-2Z
    Body Size 51*114*160 mm
    Weight 3150 g
    Technical Parameters Coil Rated Voltage 12V/24V/48V
    Rated Load Voltage 12~60V DC
    Contact Circuit Rated Load Current 400 A
    Contact Form 2NO and 2NC
    Overload Current ≤7 le
    Coil Power ≤24 W
    Main Contact Voltage Drop at 100A Load ≤100 mV
    The Allowed Range of Coil Voltage ±20%
    Pull-In Time (N/O Contacts to Open) ≤30 ms
    Drop-Out Time (N/O Contact to Close) ≤20 ms
    Insulation Resistance ≥50 MΩ
    Dielectric Withstanding Voltage 50Hz/60Hz 1000VAC/Min
    Auxiliary Contact Rated Load (Option) 2A/48VDC, 5A/24VDC
    Electric Life Continuous 20000 times
    Mechanical Life 300 thousand times
    Environment Environmental Proctection IP 50
    Operating Temperature -25℃~55℃
    Operating Humidity 5~95% RH

    DC Reversing Contactor Circuit Diagram
    dc reversing contactor circuit diagramInstallation Diagram (Unit: mm)

    dc reversing contactor 400a dimension


    400A DC Reversing Contactor Details

    Tips: Reasons for the contacts of contactor being unable to separate after powering off

    1. Control line of the coil is too long, the residual voltage is too large due to the influence of lead capacitance, which is enough to maintain a close situation for the iron core. As a result, the contacts can't be separated.
    2. Coil of the contactor has burnt out, deformed coil skeleton seizes the movable iron core, which makes it unable to move, thus the contacts can't be separated.
    3. The contact has been fused.
    4. The contactor has auto-lock function, and the function is normal.

    DC Reversing Contactor for DC Motor Forward/Reverse Control
    The reversing type of DC contactor has been designed for direct current loads, particularly motors as used on electric vehicles such as industrial trucks. In this video, ATO will show you how to use a DC reversing contactor for the DC motor forward and reverse control.

    Existing reviews of 400A DC Reversing Contactor, 2 pole, 12V/24V/48V
    400A DC reversing contactor worked fine
    The DC reversing contactor worked fine, but after replacing it, my winch still didn't work. Found out it was corroded battery terminals that was causing the problem. Cleaned them up and it worked. Only complaint would be that it is a little pricey.
    From: Darel Palm | Date: 27/11/2018
    Was this review helpful? Yes No (0/0)
    Very impressed with the quality of this 400 amp dc contactor
    Very impressed with the quality of this 400 amp dc contactor. It easy to use and dose not take up much room, has lasted a long time with no problems.
    From: Arlo Hopkins | Date: 09/10/2018
    Was this review helpful? Yes No (0/0)
    Best price, work perfectly
    I purchased three of these contacors, they work perfectly for my projects. Best price as well, will buy again as needed.
    From: Stephen | Date: 21/05/2018
    Was this review helpful? Yes No (0/0)
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