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

Product No :100254
US$ 818.90  US$ 1274.90
158 in real-time stock, 17Jul, 2024

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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 DSP Chip
5. Compliant to QSFP-DD MSA, 100G Lambda MSA, 400GBASE LR4, OIF 56G PAM4, IEEE 802.3bs
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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 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 Support Working Temperature Range 0 to 70°C (32 to 158°F)
Protocols QSFP-DD MSA Compliant Warranty 5 Years


Quality Testing Program
Quality Certifications


  • 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.


400G to 400G Direct Connectivity:

Related Products:


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.





Comprehensive Testing


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



Questions & Answers

  • How do I connect the QSFP-DD-DR4 to the 100G transceiver on my Juniper device?
    Hi, you can use cable #100851 (https://www.qsfptek.com/product/100851.html) to connect the 100G DR transceiver to build a 400G 1X4 applications.
  • What chips are 400G QSFP-DD using?
    Our 400G QSFP-DD optical chips are developed by our own and electrical chips are from Broadcom and Marvell.
  • Does 400GBASE-SR8 support DSP?
    Yes, The 400GBASE-SR8 incorporates DSP (Digital Signal Processing) technology, offering greater flexibility than CDR. DSP allows for tailored configuration adjustments to accommodate diverse application requirements.
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