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    Products / Transceivers / Direct Attach Cables (DACs) / 400G DAC / 103662
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    1m (3ft) Generic Compatible 400G QSFP-DD to 8x 50G SFP56 Passive Twinax Direct Attach Copper (DAC) Breakout Cable

    Product No: 103662
    0 Reviews
    11 Sold
    $145.20
    Compatible
    Transceivers type
    97 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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    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 8x 50G interconnect solution
4. Support for hot pluggable QSFP-DD MSA Compliant
5. Ideal for data center short-range connection between servers, switches, etc.
    See more

    Specifications

    Generic Compatible 400G QSFP-DD to 8x 50G SFP56 Twinax DAC Cable (1m, Passive, 0-70°C, 400G QSFP-DD to 8 x 50G SFP56)

                

    Generic compatible 400G QSFP-DD to 8x 50G SFP56 passive cable component product, based on 8x 50G structure, can well meet the requirements of the next generation 400G switch, server, router and other products.

               

    The 400g QSFP-DD cable assembly adopts optimized design to reduce crosstalk and insertion loss, has excellent signal integrity, and fully conforms to the next generation 400G Ethernet and Infiniband EDR standards.

                 

    SFP56 is based on the same shape of SFP+, supports 25G NRZ or 50G PAM4 Ethernet standard, can provide 25Gb/s error free transmission, and can be applied to high-density 25G Ethernet switches and network interfaces to promote server connection in data center. It adopts the current popular form factor of SFP +, which provides a more cost-effective solution for enterprises to upgrade 25G Ethernet connection.

                        

    400G QSFP DD to 8x 50G SFP56 supports interconnection of two interface devices, with single channel transmission rate of 25Gbps (NRZ) or 50Gbps (PAM4).

                       

    Part Number QT-400G-Q4Q56-P1M Vendor Name QSFPTEK
    Connector Type OSFP-DD to 8x SFP56 Data Rate 400Gb/s to 8 x 50Gb/s
    Minimum Bend Radius 39.5mm Wire AWG 30AWG
    Cable Length 1m (3ft) Jacket Material PVC
    Cable Type Passive Twinax Media Copper
    Power Consumption ≤0.1W Temperature 0 to 70°C (32 to 158°F)
    Protocols SFF-8636, SFF-8402, IEEE802.3bj, IEEE 802.3cd, 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

    Related Products

    1m (3ft) Arista Networks CAB-D-8S-400G-1M Compatible 400G QSFP-DD to 8x 50G SFP56 Passive Twinax Direct Attach Copper (DAC) Breakout Cable

    $145.20
    11 Sold
    0 Reviews

    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 to 50G Ethernet connections.
    • 3. Protocols
      Compliant with SFF-8636, SFF-8402, IEEE802.3bj, IEEE 802.3cd, QSFP-DD MSA
    • 4. Quality Certifications
      Backed by CE, FCC, ROSH, ISO9001.

    Applications

    400G to 50G Direct Connectivity:

    QT-400G-Q8S56-PxM 400G to 50G Direct Connectivity

     

    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-Q8S56-PxM Datasheet.pdf
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    Product image
    1m (3ft) Generic Compatible 400G QSFP-DD to 8x 50G SFP56 Passive Twinax Direct Attach Copper (DAC) Breakout Cable

    Compatible Generic

    Transceivers type QT-400G-Q8S56-P1M

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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
    1m (3ft) Generic Compatible 400G QSFP-DD to 8x 50G SFP56 Passive Twinax Direct Attach Copper (DAC) Breakout Cable
    $145.20
    Compatible
    Generic
    Transceivers type
    QT-400G-Q8S56-P1M
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    Product image
    1m (3ft) Generic Compatible 400G QSFP-DD to 8x 50G SFP56 Passive Twinax Direct Attach Copper (DAC) Breakout Cable

    Compatible Generic

    Transceivers type QT-400G-Q8S56-P1M

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