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    Home / Products / Transceivers / 25G/40G Transceivers / 40G QSFP+ / 22869

    Cisco QSFP-40G-LR4 Compatible 40GBASE-LR4 QSFP+ 1310nm 10km Optical Transceiver Module

    Product No: 22869
    56 Reviews
    5.8K Sold
    US$ 119.00  US$ 159.00
    Compatible
    Transceivers type
    1019 in real-time stock, 07 Jun, 2026

    Free Shipping over US$ 79.8

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    5-Year Warranty 30-Day Returns 90-Day Exchange
    Warranty
    Providing industry-leading limited lifetime warranty.
    Please check our warranty policy for details.
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    1. Rate: 40G; Connector: Duplex lC; with DDM
2. DFB+PIN; Low Power Consumption <2.5W
3. Applied in Campus Network and Data Center
4. Fully Compatible with 100+ Vendors
5. QSFP+ MSA Compliant
    See more

    Specifications

    Cisco QSFP-40G-LR4 Compatible 40GBASE-LR4 QSFP+ Optical Transceiver Module (SMF, 1310nm, 10km, LC, DDM)

     

    The Cisco QSFP-40G-LR4 compatible 40G QSFP+ transceiver module with LC duplex connectors reaches a link up to 10km over OS2 single-mode fiber (SMF). This Cisco QSFP-40G-LR4 compatible module is verified to interoperate with original Cisco switches, including the Catalyst 3580/3560X/3650/4500/6000/9300/9300L/9400/9500/9600/9800 and Nexus 2000/5000/6000/7000/7700/8500/9200/9300/9300X/9400X/9500/9600/9800 series, etc. This 40G optical transceiver comes with a bidirectional 4-channel QSFP+ connector, enabling a total of 40 Gbps bandwidth by each channel carrying a 10 Gbps data rate. DOM/DDM (digital diagnostics monitoring) function is supported on the QSFP 40G fiber optic transceiver to achieve real-time operating parameters monitoring.

     

    QSFPTEK manufactured 40GBASE-LR4 QSFP+ module is compliant with QSFP+ MSA and IEEE 802.3ba 40GBASE-LR4 specifications. Besides, the QSFP LR4 optic has been tested on host devices to ensure full compatibility with Cisco equipment, such as data center switches, enterprise routers, and server network interface cards (NICs). The third-party 40G SFP module is an ideal substitute to the Cisco QSFP-40G-LR4 QSFP+ 40G transceiver at an affordable price, providing a cost-effective compatible solution for high-performance 40G connectivity.

     

    LR4 40G QSFP optics cater to 40 Gigabit Ethernet (40GbE) optical fiber connections, ideal for high-performance and long-distance applications in the data center, enterprise core and distribution layers, campus networks, metro networks, etc. 

     

    Model Name QSFP-40G-LR4 Vendor Name QSFPTEK
    Form Factor QSFP+ Data Rate 40 Gbps
    Wavelength 1310nm Distance 10km@OS2
    Connector LC Duplex Cable Type OS2 SMF
    Transmitter Type DFB Receiver Type PIN
    TX Power -7~2.3dBm Receiver Sensitivity <-13.7dBm
    Power Consumption <2.5W Modulation Format NRZ
    DDM Support Bit Error Ratio (BER) 1E-12
    Protocols IEEE 802.3ba, QSFP+ MSA, SFF-8436, Infiniband 40G QDR 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 data center, campus network, metro network, etc.
    • 3. Protocols
      Compliant with IEEE 802.3ba, QSFP+ MSA, SFF-8436, SFF-8636.
    • 4. Quality Certifications
      Backed by CE, FCC, ROSH, ISO9001.

    Applications

    Scenario 1: 40GBASE-LR4 Direct Connectivity

    40GBASE-LR4 Direct Connectivity

     

     

    Scenario 2: 40GBASE-LR4 Connectivity with NIC

    40GBASE-LR4 Connectivity with NIC

     

     

    Scenario 3: 40GBASE-LR4 Connectivity with Adapter Panel

    40GBASE-LR4 Connectivity with Adapter Panel

     

    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

     

     

    Various Switch Tests

     

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

     

    QSFPTEK Test Devices

     

     

    40G QSFP+ Model Contrast Table

     

    Part Number

    QT-QSFP+-SR4

    QT-QSFP+-IR4

    QT-QSFP+-PSM4

    QT-QSFP+-LR4

    QT-QSFP+-LR4-20

    QT-QSFP+-ER4

    QT-QSFP+-ZR4

    Image

    Wavelength

    850nm

    CWDM

    1310nm

    CWDM

    CWDM

    CWDM

    LWDM 1294~1310nm

    Max Distance

    150m

    2km

    10km

    10km

    20km

    40km

    80km

    Cable Type

    OM3/OM4 MMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    Connector

    MPO/MTP-12

    LC Duplex

    MPO/MTP-12

    LC Duplex

    LC Duplex

    LC Duplex

    LC Duplex

    Tx Power(dBm)

    -7 ~ 1

    -7 ~ 2.3

    -6 ~ -1

    -7 ~ 2.3

    -4 ~ 2.3

    -2.7 ~ 4.5

    -2.7 ~ 4.5

    Rx Sensitivity(dBm)

    -9.5

    -11.5

    -14.4

    -13.7

    -11.5

    -19

    -28

    Power Consumption

    <0.7W

    <2.5W

    <2.5W

    < 2.5W

    <3.5W

    <3.5W

    <5W

    Source

    VCSEL + PIN

    DFB + PIN

    4xDFB + PIN

    DFB + PIN

    DFB + PIN

    DFB + PIN

    4xDFB + APD

    Operating Temperature

    0 to 70°C

    0 to 70°C

    0 to 70°C

    0 to 70°C

    0 to 70°C

    0 to 70°C

    0 to 70°C

    Questions & Answers

    • ALL (8)

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    • Premium Service (3)
    • Speed (1)
    • Excellent Quality (10)
    • Plug-and-Play (1)
    • Repurchse (2)
    • Stable (4)
    • Easy to use (1)
    • High Reliability (2)
    • High Performance (2)
    • Customer Support (1)
    • Good Price (10)
    • Good Packaging (4)
    • Compatibility (15)
    • Fast Delivery (5)
    • Bernard Timothy United States of America
      2026-05-09

      Set it up on a ~10km SMF link between core and aggregation, came up without issues and has been stable, power levels look normal, just runs a bit warmer than SR modules so airflow is worth paying attention to.

      Transceivers typeQSFP-40G-LR4

      CompatibleCisco

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    • Wilfred United States of America
      2025-12-12

      We deployed the 40G LR4 for longer connections between buildings, and it's been very reliable. Strong optical performance, easy installation, and zero link drops so far. Definitely a solid choice for stable 40G links.

      Transceivers typeQSFP-40G-LR4

      CompatibleCisco

      Verified Purchase

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      0

    • Adair Ernest United States of America
      2025-11-20

      This 40GBASE-LR4 module is great for long-distance links because it's stable, it links up quickly and it has low bit error rates. It runs all the time without any temperature problems or alarms. Optical power metrics are all good, so you can be sure it'll perform reliably. It's perfect for those 40G long-distance transmission scenarios.

      Transceivers typeQSFP-40G-LR4

      CompatibleCisco

      Verified Purchase

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      0

    • Julian Bert United States of America
      2025-09-30

      The 40GBASE-LR4 module was fully operational with our Cisco switches straight away. It provides stable 40G transmission of up to 10 km with no issues. It feels solidly built, and the link quality has been consistent. It's reliability makes it worth it.

      Transceivers typeQSFP-40G-LR4

      CompatibleCisco

      Verified Purchase

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      0

    • Freda Julia United States of America
      2025-08-01

      We used this transceiver over a 10 km single-mode link with no packet loss or signal drop. The CWDM channels aligned well with standard LR4 specifications, and the module maintained low power consumption under load. It works seamlessly with Cisco switches. It's a great value for the price, though the DOM updates slightly lag.

      Transceivers typeQSFP-40G-LR4

      CompatibleCisco

      Verified Purchase

      Helpful

      0

    • Susan Pater United States of America
      2025-05-16

      The transmission stability of this product has been tested by us, and it can reach the situation advertised on the web page, and the performance is reassuring. The heat control of the product is also very nice, which is a plus for our rack-dense deployment.

      Transceivers typeQSFP-40G-LR4

      CompatibleCisco

      Verified Purchase

      Helpful

      1

    • Mary Gus United States of America
      2025-04-30

      This product was instantly recognized when deployed on Cisco equipment in our data center, with no compatibility issues and heat generation within acceptable limits. It has been running continuously for about two to three months without any packet loss, and the quality of the product is good enough!

      Transceivers typeQSFP-40G-LR4

      CompatibleCisco

      Verified Purchase

      Helpful

      2

    • Jaroo2504 United States of America
      2025-01-06

      Bought three pairs of 40G LR4 modules with various compatibility options. They've been running smoothly on my equipment for almost two months with no problems so far.

      Transceivers typeQSFP-40G-LR4

      CompatibleCisco

      Verified Purchase

      Helpful

      0

    • Brandon United States of America
      2024-11-29

      Bought several times, the first time I received the goods unpacked, the quality is very good, consistent with the seller's description, completely exceeded my expectations, the packaging is very careful, strict, in general this time is very satisfied with a shopping

      Transceivers typeQSFP-40G-LR4

      CompatibleCisco

      Verified Purchase

      Helpful

      1

    • Stan United States of America
      2024-09-27

      Received the 40G LR4, they are of great quality, well packaged and work perfectly with my devices.

      Transceivers typeQSFP-40G-LR4

      CompatibleCisco

      Verified Purchase

      Helpful

      2

    Resources

    • PDF Document
      QT-QSFP-LR4 Datasheet.pdf
    • PDF Document
      Transceiver Module User Guide.pdf
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    Cisco QSFP-40G-LR4 Compatible 40GBASE-LR4 QSFP+ 1310nm 10km Optical Transceiver Module

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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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    8

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    Cisco QSFP-40G-LR4 Compatible 40GBASE-LR4 QSFP+ 1310nm 10km Optical Transceiver Module
    US$ 159.00
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    Cisco
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    QSFP-40G-LR4
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    Cisco QSFP-40G-LR4 Compatible 40GBASE-LR4 QSFP+ 1310nm 10km Optical Transceiver Module

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    Transceivers type QSFP-40G-LR4

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