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    400A DC Contactor, 12V/24V/48V/220V

    $78.61
    Single pole DC contactor with 12V, 24V, 48V, 220V coil voltage for choice, has one normal open contact (SPST 1NO), contact circuit rated load current of 400A, offers exceptional performance in an extremely small and lightweight device. 400A DC contactor is suitable for switch control of system circuits such as battery cars, cleaning cars, communication power supplies and automobile air conditioners.
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    SKU: ATO-DCCON-C400
    30-day Returns
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    Delivery date: 2-12 days

    High performance 400A DC contactor with normally open type. This 400 amps contactor is available in coil voltage 12V, 24V, 48V, 220V. 400A DC contactor with high-performance quality, low cost and manufacturer direct sale. The single pole 400A DC contactor is suitable for switch control of electric circuits such as electric forklifts, battery trucks, tractors, excavators, brick making machines, etc.

    Features

    • 400A DC contactor has the characteristics of small size, large load capacity, long service life and simple maintenance, and is very popular among users.
    • 400 amps contactor complies with the requirements of the ministry standards JB2286-78, JB3974-85, YD/585-92, YD/T512-92. It has been tested in the factory and by relevant testing units and meets the requirements of the ministry standards. It has been used by users for many years to satisfy users to the maximum extent. Needed, reliable quality.
    • Single coil 400A DC contactor are suitable for electric forklifts, battery trucks, tractors, excavators, brick making machines, cleaning vehicles, automotive air conditioners, communication power supplies, switch control of electronic control circuits of uninterruptible power supplies, electroplating power supplies and other systems.

    Specifications

    Model ATO-SZJ400A-D ATO-SZJ400A
    Contact Form Normally open
    Coil Rated Voltage (DC V) 12V,24V,36V,48V,60V, 72V,84V,120V,150V,220V 12V,24V,36V,48V,60V, 72V,84V,120V,150V
    Contact Rated Voltage (DC V) ≤80V
    Contact 48V Circuit Rated Load Current (DC-1) 400A
    Main Contact Contact Voltage Drop under 100A Load ≯80mV
    Cooling pull-in voltage (V), (20±5)℃ ≯70%
    Cooling Release Operating Voltage (V), (20±5)℃ ≯35%,≮5% ≯40%,≮5%
    40℃ Coil Operating Voltage Range 0.8-1.2Us
    Power-on Action Time 35ms 25ms
    Power off Release Time 10ms
    Maximum Bounce Time of Contact Connection 10ms
    Maximum Bounce Time of Contact Disconnection 3ms
    Insulation Resistance 20MΩ
    Dielectric Strength 50Hz/60Hz 1000VAC 1minute
    Maximum Breaking Capacity of Main Contact (Power on for 5ms) 1000A/5ms at 48V/DC
    Coil Power Consumption (W) 9-18 Start: 120-170, Hold: 5-11
    Coil Temperature Rise (K) ≤60 ≤45
    Terminal Temperature Rise (K) ≤65
    Electrical Life 20000times
    Mechanical Life 300,000 times
    Work Specifications Continuous
    Contact Material Silver alloy
    Load Terminal Type M10 screw
    Coil Terminal Type M4 screw
    Auxiliary Contact Rated Load (Optional) 2A/48VDC, 5A/24VDC
    Testing Agency Certification CCC, CE, FCC, RoHS


    Load Characteristic Curve

    400A DC contactor estimated electric life

    400A DC contactor estimated contact performance
    Installation Dimension Diagram

    400A DC contactor installation dimension drawing

    400A DC contactor micro installation dimension drawing

    400A DC contactor e2 installation dimension drawing

    SZJ400A-D Wiring Diagram & Coil Temperature Rise Curve Graph

    400A DC contactor d wiring diagram

    One way is normally open (SPST 1NO)
    1 and 2 are contact terminals
    A1 and A2 are coil terminals

    400A DC contactor d coil temperature rise curve graph

    SZJ400A Wiring Diagram & Coil temperature Rise Curve Graph

    400A DC contactor wiring diagram

    One way is normally open (SPST 1NO)
    1 and 2 are contact terminals
    A1 and A2 are coil terminals
    L1 is the take-off winding L2 is the holding winding

    400A DC contactor coil temperature rise curve graph

    Mechanical Capabilities and Usage Environment

    Contact Terminal M8 Tightening Torque (Nm) ≯20.5 is appropriate
    Coil Lead-out M4 Tightening Torque (Nm) ≯1.2 is appropriate
    Ambient Temperature -25~+70℃
    Relative Humidity +20℃ 98%
    Vibration Frequency at Fixed Location 3G, 1~50Hz, amplitude 0.5mm
    Impact (60~100) times/min, acceleration ≤4g
    Altitude 2000 meters
    Installation Direction Arbitrary
    Protection Level IP40 (equivalent to IEC60947)

    Tips: How to judge the quality of DC contactor?

    • Appearance: Check the DC contactor for abnormal wear, deformation or corrosion.
    • Electrical performance: Use a multimeter or rack test equipment to test the continuity of the circuit and check for damage or open circuits.
    • Mechanical performance: Check the sensitivity, operating force and reset condition of the DC power contactor switch to see if there are any problems that are too large or too small.
    • Insulation performance: Test the DC contactor to check whether there is leakage or load current drop.
    • DC contact material: The material of the contacts determines the service life of the DC power contactor. The cost of really good contacts is relatively high and is made of silver alloy. Some inferior contacts are made of copper alloy, or a layer of silver is electroplated on the copper contacts. Alloys have a very short service life.
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