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    30A High Voltage DC Contactor, 12V/24V coil

    5 out of 5 based on 4 reviews | Write a review
    Cheap Price DC contactor relay, normally open (SPST-NO) type , 30 amps rated load current of contact circuit, available with 12V or 24V coils. Magnetic contactor is widely used in the DC 12-900V high voltage field, offers exceptional performance in an extremely small and lightweight device.
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    Delivery date: 6-12 days


    • DC 12-900V rated load voltage of contact circuit.
    • SPST-NO of contact form, 12 volt, 24 volt coil for selecting.
    • Main contact voltage drop at 30A, not above 100mV.
    • The connection of contact and coil need to be nonpolarity.
    • Efficient coil, retentive power is only 2-2.3W, counter electromotive force is 0V.
    • The joint way of the coil is very convenient.
    • The coil has no counter force of electromagnetism.
    • Compare to the similar products, this product is smallest and lightest.


    Basics Model ATO-ADH30
    Dimension 51 x 36 x 40 mm
    Weight 130 g
    Main Contact Parameters Contact Form 1 NO
    Leading-Out M5 internal thread/18 mm
    Rated Load Current 30 A
    Rated Load Voltage 12 – 900V DC
    Maximum Switching Current 300A 450V DC (≥1 times)
    Maximum Switching Power 160 kW
    Rated Electric Life 10,000 times
    Coil Parameters Standard Type Voltage 12V DC 24V DC
    Work Voltage 9~16V 18~32 V
    Max Voltage 16 V 32 V
    Coil Resistance 40 Ω 152 Ω
    Average Holding Current 0.46 A 0.25 A
    Steady State Power 5.5 W 6 W
    Actuation Time ≤25 ms
    Release Time ≤10 ms
    Bounce Time ≤5 ms
    Mechanical Specification Stability 147 m/s2 (20G)
    Strength 490 m/s2 (50G)
    Vibration 80 ~2000Hz 98m/s2 (20G)
    IP Grade IP67
    Environment Operating Temperature -40℃~85℃
    Operating Humidity 5~95% RH

    Installation Diagram (Unit: mm)
    high voltage 30a dc contactor dimensionHigh Voltage DC Contactor Coil Schematic
    high voltage dc contactor coil schematic


    30A High Voltage DC Contactor Details

    Tips: Reasons for the contacts of contactor being unable to close after powering on

    1. Power supply circuit of the coil shorts.
    2. Coil circuit breaks.
    3. Coil's control voltage is too low.
    4. The contactor's coil has burnt out, thermal deformation of coil skeleton makes the iron core
    5. unable to be sucked to a proper place, thus the contact can't close.
    6. Adhesion of main contact.
    7. A foreign body or hard spots in the armature.
    8. Main contact dislocates (mainly for large contactor, bridge type contact).
    9. Auxiliary contact is not well installed.
    Existing reviews of 30A High Voltage DC Contactor, 12V/24V coil
    Will the contactor work well with a load of 12-900V DC?
    Thank you for your response.
    Can you clarify further, please?
    Will the device work well with a load of 12-900V DC, and will it work for AC loads as well? Is there a range on what voltage load I can use with AC?
    For example, would it work with a 220V AC load as well as a 120V AC load? Additionally, the main contact has female M5 threading.
    Does the bolt come with the product, or would one need to buy one separately?
    From: reut | Date: 24/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The device can work normally with a load of 12-900V DC, the rated load voltage range is 12-900V DC, it cannot work with 220V AC load and 120V AC load.
    The main contacts do not have female M5 threads, and the fixing bolts need to be purchased additionally.
    The control end needs to use a DC power supply, and the load end can use an AC load, and the device can work under 120V AC and 220VAC loads.
    Could DC contactor handle 120V AC?
    I am looking at the 30A High Voltage DC contactor, 12V/24V coil.
    I would like to know if this device can handle AC loads.
    I see that the device is rated for 12-900V DC. Could it handle 120V AC?
    All amps will be well below 30A.
    From: janaya | Date: 24/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Our 30A High Voltage DC contactor can withstand 120V AC.
    The coil voltage can be selected from 12/24V.
    Questions about 30A high voltage DC contactor
    Is your 30A high voltage DC contactor driven with DC or PWM? Are both coils driven from 1 input, or are the 2 inputs separate?
    From: Sandie | Date: 07/11/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Our DC contactor is DC driven, and 1 coil controls 1NO contact.
    Provide 30A high voltage DC contactor with 12V/24V coil
    I found a suitable factory-use in the online store. 24V coils is what I need, and the coil connection method is also very convenient. We use it in the DC high voltage field to provide excellent performance in a lightweight device.
    From: Sarah | Date: 25/02/2021
    Was this review helpful? Yes No (0/0)
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