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    Products / Transceivers / 400G/800G/1.6T Ethernet Transceivers / 800G QSFP-DD / 103614
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    Arista Networks QDD-800G-2LR4 Compatible 800GBASE-LR8 (2x 400G LR4) Twin-port QSFP-DD PAM4 1310nm 10km Dual Duplex LC/UPC DDM SMF Optical Transceiver Module

    Product No: 103614
    0 Reviews
    4 Sold
    $1,699.00
    Compatible
    Transceivers type
    6 in real-time stock, 28Oct, 2026

    Free Shipping over US$ 79.8

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    5-Year Warranty 1-Year Exchange
    Warranty
    Providing industry-leading limited lifetime warranty.
    Please check our warranty policy for details.
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    Exchanges caused by the customer's reasons will not be accepted.
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    1. Built-in Broadcom DSP Chip
2. Support 2x 400GBASE-LR4 breakout applications, no breakout cables required
3. Maximum link length 10km on SMF
4. Support 850Gb/s aggregate bit rate, Power consumption < 18W
5. Hot-pluggable QSFP-DD with dual duplex LC/UPC connectors
6. EML transmitter + PIN PD receiver, Class 1 Laser
7. Two wire serial Interface with digital diagnostic monitoring (DDM)
8. Complies with EU Directive 2011/65/EU (RoHS compliant)
    See more

    Specifications

    Arista Networks QDD-800G-2LR4 Compatible 800GBASE-LR8 (2x400G LR4) QSFP-DD PAM4 Optical Transceiver Module (1310nm, 10km, 2x Duplex LC/UPC Connectors, SMF, 0℃ to +70℃, DDM)

     

    Arista Networks QDD-800G-2LR4 Compatible 800GBASE-LR8 (2x400G LR4) QSFP-DD transceiver module supports a max data rate of 850Gbps. It enables the fiber link of 10km over single-mode fiber (SMF) with dual duplex LC/UPC connectors. The 800 Gigabit Ethernet signal is carried over 4 wavelengths at 1271nm, 1291nm, 1311nm, and 1331nm. QSFPTEK manufactured  800GBASE LR8 QSFP-DD complies with QSFP-DD800 MSA HW Rev 6.01, CMIS Rev 5.0, MSA and IEEE802.3-2022 (2x400G-LR4-10 and 2x400GBASE-LR4-6 optical interfaces), IEEE 802.3df-2024 (2x400GAUI-4 C2M electrical interface), and EU Directive 2011/65/EU (RoHS compliant).

     

    DDM (digital diagnostics monitoring) function is supported on the 800G fiber optic transceiver to achieve real-time operating parameters monitoring. Adopting the Pulse-amplitude Modulation (PAM4) modulation, the LR8 QSFP-DD achieves 800 Gigabit Ethernet through 8x 106.25 PAM4. The 800G 2LR4 QSFP-DD is widely used for gigabit Ethernet, data centers, and 800G to 2x400GBASE-LR4-6 and 2x400G-LR4-10 breakout applications. 

     

    Part Number QT-QSFP-DD-800G-2LR4 Vendor Name QSFPTEK
    Form Factor Twin-port QSFP-DD Max Data Rate 850Gbps (8x 106.25Gbps)
    Wavelength 1271nm, 1291nm, 1311nm, and 1331nm Distance 10km
    Connector Dual Duplex LC/UPC Cable Type SMF
    Transmitter Type EML Receiver Type PIN
    TX Power -2.7 to 5.1 dBm Receiver Sensitivity < -9 dBm
    Packaging Technology COB (Chip on Board) Packaging Receiver Overload 5.1 dBm
    Power Consumption <18W Modulation Format PAM4
    DDM/DOM Supported Temperature 0 to 70°C (32 to 158°F)
    Protocols IEEE802.3-2022, IEEE 802.3df-2024, QSFP-DD800 MSA HW Rev 6.01, CMIS Rev 5.0, RoHS Warranty 5 Years
    Quality Testing Program
    Optical Transceivers Testing

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

    Quality Certifications

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    Applications

    Scenario 1: 800G to 800G Direct Connectivity

    Scenario 1: 800G to 800G Direct Connectivity

     

     

    Scenario 2: 800G to 2x 400GE Breakout Connectivity

    Scenario 2: 800G to 2x 400GE Breakout Connectivity

    Product details

    Broadcom DSP Chip Reshapes 800G High-Speed ​​Interconnect

    This 800GBASE-LR8 QSFP-DD module utilizes Broadcom's top-tier PAM-4 DSP chip combines ultra-low bit error rate with the industry's lowest power consumption. It uses advanced equalization technology to compensate for optical impairments and integrates FEC functions to ensure link reliability, providing core support for high-speed data centers and AI clusters.

     

    Broadcom DSP Chip Reshapes 800G High-Speed ​​Interconnect 

     

    Easy 800G to 2x 400G Breakout with OS2 SMFs

    The 800G QSFP-DD 2LR4 module is designed with dual duplex LC/UPC connectors, while each connector can connect to a physically separate 400G LR4 QSFP-DD/OSFP module via an LC UPC Duplex OS2 SMF. This enables 800G to 2x 400G breakout links without the need for using breakout fiber optic cables.

     

    Easy 800G to 2x 400G Breakout with OS2 SMFs

     

     

    8x 100Gbps PAM4 Modulation Technology

    Utilize 8x electrial lanes and 8x optical lanes modulated at 100G PAM-4 per lane. On the output side, it convert 8x 106.25Gb/s electrical signal to 8x 106.25Gb/s optical signals. On the receiver side, it convert 8x 100Gb/s optical signal to 8x 100Gb/s electrical signals.

     

    8x 100Gbps PAM4 Modulation Technology

     

     

    800G QSFP-DD Optical Transceivers Contrast Table

     

    Part Number

    QT-QSFP-DD-800G-SR8

    QT-QSFP-DD-800G-2VR4

    QT-QSFP-DD-800G-DR8

    QT-QSFP-DD-800G-2DR4

    Image

    Data Rate

    800G

    800G

    800G

    800G

    Optical Connector

    Single MPO-16/APC

    Dual MPO-12/APC

    Single MPO-16/APC

    Dual MPO-12/APC

    Cable Type

    MMF

    MMF

    SMF

    SMF

    Wavelength

    850nm

    850nm

    1310nm

    1310nm

    Reach

    50m

    50m

    500m

    500m

    Modulation

    PAM4

    PAM4

    PAM4

    PAM4

    Max Power Consumption

    < 16W

    < 16W

    < 16.5W

    < 18W

    Application

    800G to 800G, 800G to 2x400G breakout

    800G to 800G, 800G to 2x400G breakout

    800G to 800G, 800G to 2x400G breakout, 800G to 8x100G breakout

    800G to 800G, 800G to 2x400G breakout

    Matching Downlink  Transceivers

    QT-QSFP-DD-SR4 (400G)

    QT-Q112-400G-SR4

    QT-OSFP-400G-SR4

    QT-QSFP-DD-SR4 (400G)

    QT-Q112-400G-SR4

    QT-OSFP-400G-SR4

    QT-QSFP-DD-DR4 (400G)

    QT-Q112-400G-DR4

    QT-OSFP-400G-DR4

    QT-QSFP28-DR1

    QT-QSFP-DD-DR4 (400G)

    QT-Q112-400G-DR4

    QT-OSFP-400G-DR4

    Part Number

    QT-QSFP-DD-800G-2XDR4

    QT-QSFP-DD-800G-2FR4

    QT-QSFP-DD-800G-2LR4

    		  

    Image

    		 

    Data Rate

    800G

    800G

    800G

    		  

    Optical Connector

    Dual MPO-12/APC

    Dual Duplex CS/UPC

    Dual Duplex LC/UPC

    		  

    Cable Type

    SMF

    SMF

    SMF

    		  

    Wavelength

    1310nm

    1271nm, 1291nm, 1311nm and 1331nm

    1271nm, 1291nm, 1311nm and 1331nm

    		  

    Reach

    2km

    2km

    10km

    		  

    Modulation

    PAM4

    PAM4

    PAM4

    		  

    Max Power Consumption

    < 18W

    < 18W

    ≤ 18W

    		  

    Matching Transceivers

    QT-QSFP-DD-DR4+ (400G)

    QT-Q112-400G-DR4+

    QT-QSFP28-FR1

    QT-QSFP-DD-FR4 (400G)

    QT-Q112-400G-FR4

    QT-OSFP-400G-FR4

    QT-QSFP-DD-LR4 (400G)
    QT-OSFP-400G-LR4

    		  

    Application

    800G to 800G, 800G to 2x400G breakout, 800G to 8x100G breakout

    800G to 800G, 800G to 2x400G breakout

    800G to 800G, 800G to 2x400G breakout

    		  

    Questions & Answers

    • All (2)
    • What are the key differences between 800G OSFP and 800G QSFP-DD modules?
      The key differences between 800G OSFP and 800G QSFP-DD modules are form factor, power consumption, and compatibility. OSFP modules are slightly larger and have higher power consumption than QSFP-DD modules, while QSFP-DD offers backward compatibility with QSFP28 and QSFP+ ports, which OSFP does not support.
    • Can an OSFP module interoperate with a QSFP-DD module on an 800G link?
      Yes. OSFP and QSFP-DD are different form factors, but they can interoperate on an 800G link as long as the optical modules on both ends use the same transmission protocol and the same optical channel rate. The key requirement is that each module is supported by and physically compatible with its respective host device ports, rather than both ends using the same form factor.

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    Resources

    • PDF Document
      QT-QSFP-DD-800G-2LR4 Datasheet.pdf
    • PDF Document
      Transceiver Module User Guide.pdf
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    Arista Networks QDD-800G-2LR4 Compatible 800GBASE-LR8 (2x 400G LR4) Twin-port QSFP-DD PAM4 1310nm 10km Dual Duplex LC/UPC DDM SMF Optical Transceiver Module

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    Transceivers type QDD-800G-2LR4 | 10km | Dual Duplex LC/UPC

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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!

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    Arista Networks QDD-800G-2LR4 Compatible 800GBASE-LR8 (2x 400G LR4) Twin-port QSFP-DD PAM4 1310nm 10km Dual Duplex LC/UPC DDM SMF Optical Transceiver Module
    $1,699.00
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    QDD-800G-2LR4 | 10km | Dual Duplex LC/UPC
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    Arista Networks QDD-800G-2LR4 Compatible 800GBASE-LR8 (2x 400G LR4) Twin-port QSFP-DD PAM4 1310nm 10km Dual Duplex LC/UPC DDM SMF Optical Transceiver Module

    Compatible Arista

    Transceivers type QDD-800G-2LR4 | 10km | Dual Duplex LC/UPC

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