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    50A High Voltage DC Contactor, 12V/24V coil

    5 out of 5 based on 5 reviews | Write a review
    $111.85
    High voltage DC contactor, normally open type (SPST-NO), 50 amps rated load current of contact circuit, available with 12V or 24V coils, the connection of contact and coil need to be nonpolarity. It is widely used in the DC high voltage field, such as electric car, wind power generation, DC power supply control system and so on.
    *
    SKU: ATO-DCCON-HV50
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    Features

    • 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 50A, 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.

    Specifications

    Basics Model ATO-ADH50
    Dimension 55 x 42 x 62 mm
    Weight 230 g
    Main Contact Parameters Contact Form 1 NO
    Leading-Out M5 internal thread/18 mm
    Rated Load Current 50 A
    Rated Load Voltage 12 – 900V DC
    Maximum Switching Current 500A 320V 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 26 Ω 96 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 196 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 50a dc contactor dimension 1
    high voltage 50a dc contactor dimension 2High Voltage DC Contactor Coil Schematic
    high voltage dc contactor coil-schematic

    Details

    50A High Voltage DC Contactor Details

    Tips: Fusion welding of the contactor due to electric shock, how to solve?

    Possible causes of the fault:

    • short circuit of contactor on the load side.
    • Overload use of contactor contact.
    • There’s a foreign body or a metal particle on the surface of the contact.
    • Pressure of the contact spring is too small.
    • Poor contact of contactor's lines, which makes the contactor repeatedly pull in and release at a moment.

    Maintenance method:

    1. Power off at first, separate the welding contacts with a screwdriver, correct the contact surface and eliminate the short-circuit fault.
    2. Replace with a large capacity and high quality contactor.
    3. Smooth the contact surface with a steel file and remove foreign bodies.
    4. Readjust the spring pressure.
    5. Check the bad contacts of the coil control loop of the contactor, reconnect the loop or replace electrical components, ensure a good on-off situation.
    Existing reviews of 50A High Voltage DC Contactor, 12V/24V coil
    What kind of threads do DC contactors have?
    Alright, thank you for your response.
    If the main contacts do not have female M5 threads, what kind of threads do they have?
    From: quella | Date: 25/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The main contact thread of ATO-ADH30 is M4, and the main contact thread of ATO-ADH50 is M5.
    What is the internal difference between an AC and a DC contactor?
    What is the internal difference between an AC and a DC contactor?
    It's just a switch why wouldn't it work because of being DC?
    And I need a contactor with a 48V DC coil preferably normally closed.
    From: niki | Date: 19/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The core and coil of the internal design of the AC contactor and the DC contactor are different.
    The internal coil and iron core of the AC contactor can only use AC power, and it is easy to burn out once it is used for DC voltage.
    This is because the design principles of AC contactors and DC contactors are different.
    If you want a DC contactor with a 48V DC coil, withstand voltage 300V DC, 32A, we recommend this 50A High Voltage DC Contactor. This contactor can be made into coil 48V DC, load voltage DC 12-900V, but the Contact Form only has 1 NO.
    What part number should we order?
    We need two N.O. contactors rated at 150 amps with 12-volt coils and specified to use your 200 amp, with N.O. and assuming the use of an auxiliary NO, what part number should we order?
    From: rayparker | Date: 29/06/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Unfortunately, we do Not provide a voltage contactor for 200A. The high-voltage contactor has 200A and only one auxillary N.O, please refer to the link: https://www.ato.com/200a-high-voltage-dc-contactor-12v-24v-coil
    Few questions
    1. Why does the DC version cost 20$ more? Is there a difference in the internal structure between AC coil and DC coil?
    2. What are the typical open/close times?
    3. The supported altitude is 2000m. Is there an option to increase it to 2500m?
    From: Puth | Date: 10/12/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    1. The DC coil version is larger, and the material is different, so the price will be higher.
    2. The reaction time of contactor "typical open/close" is 0.3 second.
    3. Yes, it can be used at an altitude of 2500m, but this may have a little impact on performance.
    Does your 50A high voltage DC contactor have a gas or vacuum filled arc chamber?
    I want to ask if your 50A high voltage DC contactor ADH150/900-E has a gas or vacuum filled arc chamber?
    From: Covfe | Date: 02/11/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Our ADH series of DC contactors have inert gas in the arc chamber.
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