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    Home / Products / Transceivers / 100G/200G Transceivers / 100G QSFP28 / 39587

    Cisco QSFP-100G-LR4-S Compatible 100GBASE-LR4 QSFP28 1310nm 10km LC Duplex SMF DDM Optical Transceiver Module

    Product No: 39587
    75 Reviews
    6.6K Sold
    US$ 189.90  US$ 299.00
    Compatible
    Transceivers type
    1098 in real-time stock, 11 Jun, 2026

    Free Shipping over US$ 79.8

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    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.
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    Add to Cart Bulk Order Quotes 
    1. Rate: 100G; Connector: LC; with DDM
2. DFB+PIN; Low Power Consumption ≤3.5W
3. Applied in Campus Network, Data Center and Enterprise Core Layer
4. Compatible with 200+ Vendors
5. Hot Pluggable QSFP28 MSA Compliant
    See more

    Specifications

    Cisco QSFP-100G-LR4-S Compatible 100GBASE-LR4 QSFP28 Optical Transceiver Module (SMF, 1310nm, 10km, LC, DDM)

     

    The Cisco QSFP-100G-LR4-S compatible optical transceiver module with duplex LC connectors reaches a link up to 10km over OS2 single-mode fiber (SMF). The Cisco QSFP-100G-LR4-S compatible module is verified to interoperate with original Cisco switches, including the Catalyst 9300/9400/9500/9600 series and Nexus 3000/9300/9500 series switches. QSFPTEK manufactured 100GBASE-LR4 QSFP28 transceiver module is compliant with IEEE 802.3ba 100GBASE-LR4, QSFP28 MSA standard. Besides, DDM (digital diagnostics monitoring) function is supported on the 100G fiber optic transceiver to achieve real-time operating parameters monitoring. With these features, this 100G QSFP28 transceiver is widely applied in 100G telecom connections, data centers, high-performance computing networks, enterprise core and distribution layers, campus networks, etc.     

            

    Part Number:

    QT-QSFP28-LR4

    Vendor Name:

    QSFPTEK

    Form Factor:

    QSFP28

    Data Rate:

    100Gbps

    Wavelength:

    1295~1310nm

    Distance:

    10km

    Connector:

    Duplex LC

    Cable Type:

    OS2 SMF

    Transmitter:

    4x LAN WDM DML (DFB)

    Receiver Type:

    PIN

    TX Power:

    -4.3 to +4.5dBm

    Receiver Sensitivity:

    <-10.6dBm

    Power Consumption:

    ≤4W

    Modulation Format:

    NRZ

    DDM:

    Support

    Bit Error Ratio (BER):

    1.00E-12

    Protocols: 

    IEEE 802.3ba 100GBASE-LR4, IEEE 802.3bm, QSFP28 MSA, SFF-8665, SFF-8636

    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

    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
      Fully compatible with almost all Cisco devices. Ideal for 100G telecom connections, data center, high-performance computing networks, enterprise core and distribution layers etc.
    • 3. Protocols
      Compliant with IEEE 802.3ba 100GBASE-LR4, IEEE 802.3bm, QSFP28 MSA, SFF-8665, SFF-8636.
    • 4. Quality Certifications
      Backed by CE, FCC, ROSH, ISO9001.

    Applications

    Scenario 1: 100G Switch to 100G Switch Direct Connectivity

    QT-QSFP28-LR4 Scenario 1 100G Switch to 100G Switch Direct Connectivity  

     

    Scenario 2: 100G Switch to 100G NIC Direct Connectivity

    QT-QSFP28-LR4 Scenario 2 100G Switch to 100G NIC 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.

     

    QSFPTEK Test Rack

     

     

    Comprehensive Testing

     

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

     

    QSFPTEK Test Devices

     

     

    100G QSFP28 Model Contrast Table

            

    Part Number

    QT-QSFP28-SR4

    QT-QSFP28-PSM4

    QT-QSFP28-IR4

    QT-QSFP28-LR4

    QT-QSFP28-CWDM-LR4

    QT-QSFP28-ER4 (Rx SOA)

    QT-QSFP28-ZR4

    Image

    Wavelength

    850nm

    1310nm

    1271~1331nm

    1310nm

    1271~1331nm

    1310nm

    1310nm

    Max Distance

    100m

    500m

    2km

    10km

    10km

    40km

    80km

    Cable Type

    OM3/OM4 MMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    Connector

    MPO/MTP-12

    MPO/MTP-12

    LC Duplex

    LC Duplex

    LC Duplex

    LC Duplex

    LC Duplex

    Tx Power(dBm)

    -8.4~+2.4

    -9.4~+2

    -6.5~+2.5

    -4.3~+4.5

    -6.5~+2.5

    -2.9~+4.5

    +2~+7

    Rx Sensitivity(dBm)

    -10.3

    -12.66

    -11.5

    -10.6

    -11.5

    -20.9

    -27

    Max Power Consumption

    2.5W

    3.5W

    3.5W

    4W

    3.5W

    5W

    5.5W

    Source

    VCSEL+PIN

    DFB+PIN

    CWDM DFB+ PIN

    EML+PIN

    CWDM DFB +PIN

    4x EML+SOA+PIN

    EML+SOA+PIN

    Operating Temperature

    0~70°C

    0~70°C

    0~70°C

    0~70°C

    -40~85°C (Available)

    0~70°C

    0~70°C

    -20~85°C (Available)

    0~70°C

    -40~85°C (Available)

     

    Questions & Answers

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    • Shopping Experience (3)
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    • High Performance (6)
    • Customer Support (4)
    • Good Price (8)
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    • Compatibility (11)
    • Asa Wright United States of America
      2026-03-27

      It's been pretty easy to deal with. Plugged it in and it came up right away, didn't have to mess with any extra settings. Just using regular LC single-mode fiber, connection has been stable during normal daily use. Haven't noticed any drops or weird issues so far. Overall feels like a solid, hassle-free option for longer links.

      Transceivers typeQSFP-100G-LR4-S

      CompatibleCisco

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    • John United States of America
      2026-03-06

      The ordering and shipping process went smoothly, and the packaging was quite sturdy—no damage occurred during transit. Overall, it offers good value for money. Should I have additional networking needs in the future, I would consider purchasing again.

      Transceivers typeQSFP-100G-LR4-S

      CompatibleCisco

      Verified Purchase

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      0

    • Sigrid Jessie United States of America
      2026-01-30

      The module we ordered performed reliably in actual deployment. The link was established quickly after installation, requiring almost no additional intervention during operation. Daily monitoring showed that optical power and bit error rate remained within normal ranges, and no link disconnections or abnormal alarms occurred during extended operation.

      Transceivers typeQSFP-100G-LR4-S

      CompatibleCisco

      Verified Purchase

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    • Cornelius Cooper United States of America
      2025-12-19

      The 100GBASE-LR4 module reliably and consistently performs long-distance transmission. The link establishes quickly, and the signal quality stays the same even when used for a long time.It's a good choice for 100G links that need reliable long-range connectivity.

      Transceivers typeQSFP-100G-LR4-S

      CompatibleCisco

      Verified Purchase

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      0

    • Brian United States of America
      2025-12-19

      These 100G QSFP28 LR4 transceivers were exactly what we needed for long-reach 100G links between buildings. Signal quality remains consistent over 10 km, and the LC duplex interface integrates seamlessly with our existing SMF infrastructure.

      Transceivers typeQSFP-100G-LR4-S

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      Verified Purchase

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      0

    • Ame Gus United States of America
      2025-10-22

      We've been using the 100GBASE-LR4 module for a few months now, and it's been working perfectly. The installation was just plug and play, no compatibility issues to speak of. It stays pretty reliable over long distances and you hardly notice any packet loss. The build quality feels solid too. All in all, it's a really reliable module for data centers.

      Transceivers typeQSFP-100G-LR4-S

      CompatibleCisco

      Verified Purchase

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      1

    • Sawyer United Kingdom
      2025-09-26

      We have deployed QSFPTEK's 100G QSFP28 LR4 modules in our data center. The long-distance transmission remains high-speed and stable, easily meeting the high-traffic business needs of our data center.

      Transceivers typeQSFP-100G-LR4-S

      CompatibleCisco

      Verified Purchase

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      1

    • Quintion Service United States of America
      2025-08-22

      The 100G QSFP28 LR4 module worked like a charm, providing excellent long-distance connectivity across our campus network. The signal quality and stability are impressive, even under heavy load, and the latency is minimal. It was a smooth integration with our existing Cisco switch, saving us a lot of setup time.

      Transceivers typeQSFP-100G-LR4-S

      CompatibleCisco

      Verified Purchase

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      1

    • Steven United States of America
      2025-07-04

      QSFPTEK delivers excellent 100G LR4 modules with outstanding performance and reliability. Their team is knowledgeable and always ready to assist with any networking questions, making the purchasing process smooth and worry-free.

      Transceivers typeQSFP-100G-LR4-S

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      1

    • Bo Ki Australia
      2025-04-30

      I’ve lost count of how many 100G LR4 modules I’ve purchased from QSFPTEK. One thing I know for sure—you won’t regret choosing them. Reliable products and consistent service every time

      Transceivers typeQSFP-100G-LR4-S

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    Video

    Resources

    • PDF Document
      QT-QSFP28-LR4 Datasheet.pdf
    • PDF Document
      Transceiver Module User Guide.pdf
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    Cisco QSFP-100G-LR4-S Compatible 100GBASE-LR4 QSFP28 1310nm 10km LC Duplex SMF DDM Optical Transceiver Module

    Compatible Cisco

    Transceivers type QSFP-100G-LR4-S

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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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    Cisco QSFP-100G-LR4-S Compatible 100GBASE-LR4 QSFP28 1310nm 10km LC Duplex SMF DDM Optical Transceiver Module
    US$ 299.00
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    Cisco QSFP-100G-LR4-S Compatible 100GBASE-LR4 QSFP28 1310nm 10km LC Duplex SMF DDM Optical Transceiver Module

    Compatible Cisco

    Transceivers type QSFP-100G-LR4-S

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