Welcome to QSFPTEK Global     Free shipping on U.S. & EU orders over US$79.8     Global warehouse

Currency: USD
USD - US Dollar
EUR - Euro
JPY - Japanese Yen
KRW - Korean Won
English
Contact Us
Search

Cart

0
Free shipping on U.S. & EU orders over US$79.8
English
  • English

    • Chat Now

    [email protected]

    (858) 583 6532

    Currency: USD
    Choose language
    Back
    • USD - US Dollar
    • EUR - Euro
    • JPY - Japanese Yen
    • KRW - Korean Won
    Back

    -
    +

    Add to Cart

    Home / Products / Transceivers / 400G/800G Ethernet Transceivers / 400G QSFP-DD / 100254

    Cisco QDD-400G-LR4-S Compatible 400GBASE-LR4 QSFP-DD PAM4 1310nm 10km DOM Duplex LC/UPC SMF Optical Transceiver Module

    Product No: 100254
    1 Reviews
    58 Sold
    US$ 688.00
    Compatible
    Transceivers type
    22 in real-time stock, 04 Jun, 2026

    Free Shipping over US$ 79.8

    Global warehouses in stock

    5-Year Warranty 1-Year Exchange
    Warranty
    Providing industry-leading limited lifetime warranty.
    Please check our warranty policy for details.
    Returns & Exchange
    Exchanges caused by the customer's reasons will not be accepted.
    Please ensure that the item you're returning is repackaged with all the cords, adapters, and documentation included when you receive it.
    Please check our Return Policy for details.
    -
    +
    Add to Cart Bulk Order Quotes 
    1. Hot Pluggable QSFP-DD form factor
2. Max power consumption 12W
3. Link length up to 10km via duplex LC connector
4. Built-in Inphi Macom DSP Chip
5. Compliant to QSFP-DD MSA, 100G Lambda MSA, 400GBASE LR4, OIF 56G PAM4, IEEE 802.3bs
    See more

    Specifications

    Cisco QDD-400G-LR4-S Compatible 400GBASE-LR4 QSFP-DD 1310nm 10km DOM Optical Transceiver Module (SMF, 1310nm, 10km, LC, DOM)

     

    The 400G LR4 module is designed to reach 10km distances over single-mode fiber (SMF) for 400 Gigabit Ethernet transmission. The 400 Gigabit Ethernet signal is carried over four CWDM grid optical wavelengths via a duplex LC connector.

     

    QSFPTEK QDD-400G-LR4 400G QSFP-DD LR4 module is compliant with QSFP-DD MSA, 100G Lambda MSA 400G-LR4, IEEE 802.3bs, and OIF 56G PAM4 standards and is mainly applied in 400G Ethernet, Data Center, and Cloud Networks.

     

    Model Name QT-QSFPDD-LR4 Vendor Name QSFPTEK
    Form Factor QSFP-DD Data Rate 425 Gbps
    Wavelength 1271nm,1291nm,1311nm,1331nm Distance 10km
    Connector Duplex LC/UPC Cable Type SMF
    Transmitter Type CWDM EML Receiver Type PIN
    TX Power -2.7~5.1dBm Receiver Sensitivity <-9.0dBm
    Power Consumption ≤12W Extinction Ratio 3.5dB
    DDM/DOM Supported Working Temperature Range 0 to 70°C (32 to 158°F)
    Protocols QSFP-DD MSA Compliant Warranty 1 Year

    20

    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. Super High-density
      Industry’s highest bandwidth density 400G optical module for 400 Gigabit Ethernet connectivity.
    • 3. Protocols
      Compliant with QSFP-DD MSA, 100G Lambda MSA, 400GBASE LR4, OIF 56G PAM4, IEEE 802.3bs.
    • 4. Quality Certifications
      Backed by CE, FCC, ROSH, ISO9001.

    Applications

    400G to 400G Direct Connectivity:

    QT-QSFP-DD-LR4 400G to 400G Direct Connectivity

    Product details

    Various Switch Tests

     

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

     

     

     

    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.

     

    QDD-400G-LR4-S compatibility test

     

     

    Comprehensive Testing

     

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

     

     

     

    Short to Medium Reach 400G QSFP-DD Optics Contrast Table

     

    Part Number

    QT-QSFP-DD-SR4

    QT-QSFP-DD-SR8

    QT-QSFP-DD-DR4

    QT-QSFP-DD-DR4+

    QT-QSFP-DD-FR4

    Image

    Center Wavelength

    850nm

    850nm

    1310nm

    1310nm

    1310nm

    Connector

    MTP/MPO-12

    MTP/MPO-16

    MTP/MPO-12

    MTP/MPO-12

    Duplex LC

    Cable Distance (Max.)

    100m

    100m

    500m

    2km

    2km

    Modulation

    PAM4

    PAM4

    PAM4

    PAM4

    PAM4

    Transmitter + Receiver Type

    VCSEL 850nm + PIN

    VCSEL 850nm + PIN

    EML + PIN

    EML + PIN

    CWDM EML + PIN

    TX Power

    -4.6~4.0dBm

    -6.5~4.0dBm

    -2.9~4.0dBm

    -3.1~4.0dBm

    -3.2~3.5dBm

    Receiver Sensitivity

    <-6.3dBm

    <-8.4dBm

    <-5.9dBm

    <-7.1dBm

    <-7.3dBm

    Power Consumption

    ≤8W

    ≤12W

    ≤12W

    ≤12W

    ≤12W

    Temperature

    0 to 70°C (32 to 158°F)

    0 to 70°C (32 to 158°F)

    0 to 70°C (32 to 158°F)

    0 to 70°C (32 to 158°F)

    0 to 70°C (32 to 158°F)

    Application

    Data Center

    Data Center

    400G to 2x200G Breakout

    400G to 8x50G Breakout

    Data Center

    400G to 4x100G Breakout

    800G to 2x400G Breakout

    Data Center

    400G to 4x100G Breakout

    800G to 2x400G Breakout

    Data Center

    800G to 2x400G Breakout

      

    Questions & Answers

    • ALL (11)
    • 400G QSFP-DD (2)
    • QT-OSFP-400G-SR8 (1)
    • QT-QSFP-DD-SR8 (4)
    • QT-QSFP-DD-FR4 (1)
    • QT-QSFP-DD-DR4 (3)

    Customer Reviews

    Write a Review
    Sign in to write a review
    Write a Review

    5 stars

    1 Reviews

    4 stars

    0 Reviews

    3 stars

    0 Reviews

    2 stars

    0 Reviews

    1 stars

    0 Reviews

    Reviews with images

    See all photos

    Read reviews that mention

    • ALL (1)
    • Stable (1)
    • Compatibility (1)
    • Mike Williams United States of America
      2025-09-19

      Used it in our core network to establish a critical 10km link between data centers. They were a perfect fit in our Cisco Nexus 9236C switches, recognized immediately without any compatibility issues. We've subjected it to heavy traffic loads, and it hasn't skipped a beat: no errors, no drops, and no overheating. Highly recommended for anyone needing reliable, high-speed, long-range connectivity.

      Transceivers typeQDD-400G-LR4-S | 10km

      CompatibleCisco

      Verified Purchase

      Helpful

      0

    Video

    Resources

    • PDF Document
      QT-QSFP-DD-LR4 QDD-400G-LR4 Datasheet.pdf
    • PDF Document
      Transceiver Module User Guide.pdf
    Check Test Reports on Target Device
    Contact us
    Write a Review
    Cisco QDD-400G-LR4-S Compatible 400GBASE-LR4 QSFP-DD PAM4 1310nm 10km DOM Duplex LC/UPC SMF Optical Transceiver Module

    Compatible Cisco

    Transceivers type QDD-400G-LR4-S | 10km | Duplex LC/UPC

    * Review
    0/1000
    Allow files type of JPG, PNG, MP4. Maximum file size: 5MB

    Maximum size: 5MB

    Satisfaction
    Customer Gallery
    View All Customer Gallery

    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

    Helpful

    8

    Sign in to vote
    Added to Cart
    Cisco QDD-400G-LR4-S Compatible 400GBASE-LR4 QSFP-DD PAM4 1310nm 10km DOM Duplex LC/UPC SMF Optical Transceiver Module
    US$ 688.00
    Compatible
    Cisco
    Transceivers type
    QDD-400G-LR4-S | 10km | Duplex LC/UPC
    Quantity
    Subtotal
    View Cart
    Check Out
    Continue shopping

    Confirmation

    Successfully added shopping cart

    Bulk Order Quotes
    Cisco QDD-400G-LR4-S Compatible 400GBASE-LR4 QSFP-DD PAM4 1310nm 10km DOM Duplex LC/UPC SMF Optical Transceiver Module

    Compatible Cisco

    Transceivers type QDD-400G-LR4-S | 10km | Duplex LC/UPC

  • Qty:

  • Name:

  • E-mail:

  • Country