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    Products / Transceivers / Direct Attach Cables (DACs) / 400G DAC / 103759
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    1.5m (5ft) Generic Compatible 400G QSFP-DD to 2x 200G QSFP56 Passive Twinax Direct Attach Copper (DAC) Breakout Cable

    Product No: 103759
    0 Reviews
    5 Sold
    $137.40
    Compatible
    Transceivers type
    48 in real-time stock, 24Oct, 2026
    Delivered in 5 business days in the U.S.
    5-Year Warranty 30-Day Returns 90-Day Exchange
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    Providing industry-leading limited lifetime warranty.
    Please check our warranty policy for details.
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    1. Tested in Host Devices for compatibility and performance	
2. Low power consumption, low crosstalk. 
3. Cost-effective 400G to 2x 200G QSFP56 interconnect solution
4. Support for hot pluggable SFF-8636, QSFP-DD MSA, IEEE803.3bj&IEEE802.3cd Compliant
5. Ideal for data center short-range connection between servers, switches, etc.
    See more

    Specifications

    Generic Compatible 400G QSFP-DD to 2x 200G QSFP56 Twinax DAC Breakout Cable (1.5m, Passive, 0-70°C, 400G QSFP-DD to 200G QSFP56)

     

    The 400G QSFP-DD to 2x 200G QSFP56 passive direct attach copper twinax cables deliver high performance and bandwidth while offering a cost-effective interconnect solution. They provide reliable 400G QSFP-DD to 200G QSFP56 pluggable connectivity. Fully compliant with SFF-8636, QSFP-DD MSA, IEEE803.3bj&IEEE802.3cd standards. These cable assemblies are an excellent choice for 400G Ethernet deployments, such as 400G switches, servers, routers and other products application needs.

     

    Part Number QT-400G-QDD2Q56-P1.5M Vendor Name QSFPTEK
    Connector Type QSFP-DD to 2x QSFP56 Data Rate 400 Gbps
    Minimum Bend Radius 33.5mm Wire AWG 30AWG
    Cable Length 1.5m (5ft) Jacket Material PVC 
    Cable Type Passive Twinax Media Copper
    Power Consumption ≤0.1W Temperature 0 to 70°C (32 to 158°F)
    Protocols IEEE802.3bj, IEEE802.3ck, SFF-8636, QSFP-DD MSA Modulation PAM4
    Quality Testing Program
    Optical Transceivers Testing

    Take a look at our test program to get the reliable and high-performance optical transceivers.

    Quality Certifications

    Features

    • 1. High Reliablility and Best Price
      Proudly self-producing and rigorous testing, QSFPTEK is dedicated to delivering cost-effective products with high reliability and performance at trade price.
    • 2. Wide Application Scenarios
      Ideal for ToR, adjacent racks, and short-range 400G Ethernet connections.
    • 3. Protocols
      Compliant with IEEE802.3bj, IEEE802.3ck, SFF-8636, QSFP-DD MSA standards.
    • 4. Quality Certifications
      Backed by CE, FCC, ROSH, ISO9001.

    Applications

    400G QSFP-DD to 2x 200G QSFP56 Direct Connectivity:

    400G QSFP-DD to 2x 200G QSFP56

    Product details

    Various Switch Tests

      

    Every cable is quality tested for compatibility in the multi-brand switches environment, which guarantees flawless operations.

         

    QSPFTEK LAB All Brands Switches Show

     

    Tested in The Host Device to Prove Interoperability

      

    Every unit sold undergoes rigorous quality testing, to ensure compatibility in the target switch environment, guaranteeing perfect operation.

                                                              

    QSFPTEK Test Rack

     

    Comprehensive Testing

     

    Every cable is qualified through rigorous procedures and advanced equipment to ensure high-quality and reliable optical devices for you.

                                 

    QSFPTEK Test Devices

     

    Questions & Answers

    • All (5)
    • Once I place an order for my direct attach cables, how long will it take to receive them?
      QSFPTEK has been maintaining adequate stock level of kinds of Direct Attach Copper Cables in the warehouse. As long as the products you order are all in stock, we will ship them out the same day you place your order. As for some specific products or products that have a short stock, we will keep you informed ahead of time before you place your order.
    • Why should I trust QSFPTEK compatible direct attach cables?
      Exceting the price advantage we have compared to branded cables, QSFPTEK DACs also maintain the same performance and reliability. To satisfy our customers' needs of high performance, all of our DACs are tested multiple times in mainstream original brand switches in our test center before shipped out. What's more, using compatible optics in brand devices will not negatively affect manufacturers' warranty if that's your concern.
    • Can I have different compatibilities for each end of my direct attach cables?
      Yes, QSFPTEK offers customized dual compatibility solutions for direct attach cables so that you can choose compatibilities for each end individually. Just contact your sales rep. for detailed compatible customization on dual ends.

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    Resources

    • PDF Document
      QT-400G-QDD2Q56-PxM Datasheet.pdf
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    Product image
    1.5m (5ft) Generic Compatible 400G QSFP-DD to 2x 200G QSFP56 Passive Twinax Direct Attach Copper (DAC) Breakout Cable

    Compatible Generic

    Transceivers type QT-400G-QDD2Q56-P1.5M

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    Satisfaction
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    Mark

    2023-12-15
    This product works well with my switch, and I plan to buy some DWDM transceivers from QT. Excellent value fo ct works well with my switch, and I plan to buy some DWDM transceivers from QT. Excellent valur money!

    Verified Purchase

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    Product image
    1.5m (5ft) Generic Compatible 400G QSFP-DD to 2x 200G QSFP56 Passive Twinax Direct Attach Copper (DAC) Breakout Cable
    $137.40
    Compatible
    Generic
    Transceivers type
    QT-400G-QDD2Q56-P1.5M
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    Product image
    1.5m (5ft) Generic Compatible 400G QSFP-DD to 2x 200G QSFP56 Passive Twinax Direct Attach Copper (DAC) Breakout Cable

    Compatible Generic

    Transceivers type QT-400G-QDD2Q56-P1.5M

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