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    100A DC Reversing Contactor, 2 pole, 12V/24V/48V

    5 out of 5 based on 7 reviews | Write a review
    Low cost reversing contacor with two interlocked contacts, to prevent the motor from running forwards and backwards simultaneously. 2 pole DC contactor with 2NO and 2NC (DPST-NO, DPST-NC) contact form, coil rated voltage with 12V/24V/48V DC for choice.
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    ATO ADC100 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.


    • 100 amps rated load current of contact circuit.
    • DPST-NO, DPST-NC contact form.
    • 12V, 24V, 48V DC coil rated voltage for selection.
    • Main contact voltage drop at 100A, not above 80mV.
    • Mechanical life up to 300 thousand times.


    Basics Model ATO-ADC100
    Body Size 100*63*101 mm
    Weight 990 g
    Technical Parameters Coil Rated Voltage 12V/24V/48V
    Rated Load Voltage 12V~60V DC
    Contact Circuit Rated Load Current 100 A
    Contact Form 2NO and 2NC
    Starting Current ≤4 A
    Overload Current ≤8 le
    Coil Power ≤8 W
    Main Contact Voltage Drop at 100A Load ≤80 mV
    The Allowed Range of Coil Voltage ±20%
    Pull-In Time (N/O Contacts to Open) ≤20 ms
    Drop-Out Time (N/O Contact to Close) ≤10 ms
    Insulation Resistance ≥50 MΩ
    Dielectric Withstanding Voltage 50Hz/60Hz 1500VAC/Min
    Electric Life Continuous 30000 times
    Mechanical Life 300 thousand times
    Environment Operating Temperature -40℃~85℃
    Operating Humidity 5~95% RH

    DC Reversing Contactor Circuit Diagram

    dc reversing contactor circuit diagram

    Installation Diagram (Unit: mm)

    dc reversing contactor 100a dimensionTips: DC contactor working principle

    When the contactor coil powers on, the coil current generates a magnetic field, which makes the static iron core to produce magnetic adhesion and then suck the moving iron core, thus driving the movable contact to move. Normally closed contact disconnects and normally open contact closes, the two are linked. When the coil powers on, magnetic adhesion disappears, the armature releases under the effect of retracting spring, thus restoring the contact: Normally open contact disconnects while the normally closed contact closes.
    DC contactor should be used in the DC power loop, such as the DC oil pump. This motor is used to guarantee the oil supply of turbine system at the time of power outage, both of its main circuit and auxiliary circuit are DC, so is the contactor.

    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 100A DC Reversing Contactor, 2 pole, 12V/24V/48V
    Does the 100A version have a similar setup to the 50A version?
    I ordered the following product in the subject line and was wondering if there was any documentation for wiring this specific contactor to a motor. I saw the video on the product site however that was for the 50A version, is it a similar setup for the 100A version? Please and thanks.
    From: June | Date: 29/05/2022
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, it is a similar setup for the 100A version, you can refer to that video to complete all the operation settings, note that your motor starting current should not exceed the contactor's rated continuous current of 100A.
    Use time of 100A DC reversing contactor
    How long can the coils be energized for your 100A reversing contactor ATO-DCCON-R100?
    From: Aloysus | Date: 29/07/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The conactor (ATO-DCCON-R100) coil working specification can be continuous or discontinuous mode, continuous use for 24 hours or longer without any problem, as long as you don't use it overloaded. And the electrical life will be 30000 times.
    Coil of 100A DC reversing contactor
    Your DC reversing contactor ATO-DCCON-R100: is each contact able to conduct 100amps? and if so am I supposed to energize only one coil at a time? The coils are both labelled "K" so it seems to imply that both coils should be energized at the same time?
    From: Stefanv | Date: 22/06/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, each contact able to conduct 100amps. But it has 2 coils for selection of positive and negative directions. The middle contact of the coil should be connected to the negative pole of the power supply, and the other ends of the coil are connected to the positive pole of the power supply. Only one coil is connected at a time.
    Can the 100A DC reversing contactor handle continuous loads?
    Will your 100A reversing DC contactor handle continious duty?
    From: Michaela | Date: 21/04/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, 24/7.
    Contactor works perfectly
    Used this to switch on the inverter for my car. So far so good, works perfectly. Great price as well. I'm giving this DC reversing contactor a 5-star rating.
    From: C | Date: 05/03/2020
    Was this review helpful? Yes No (0/0)
    I need the 3D CAD model of the contactor
    Hi, I recently purchased one of your 100A DC reversing contactors for my application and I am in the process of designing a mechanical enclosure for my setup. I need the 3D CAD model of the contactor that I purchased to integrate into my system!
    From: Gabriel Isko | Date: 04/11/2019
    Was this review helpful? Yes No (0/0)
    ATO Responded
    OK, will send you by email.
    Will buy 48V DC contactor again
    I couldn't find 100A 2 pole dc contactor on the local auto parts, but I had a chance to find and I believe there is I have been looking for dc contactor. Thanks for the reasonable price, a project is a perfect job.
    From: Chuck | Date: 29/11/2018
    Was this review helpful? Yes No (0/0)
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