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    Products / Transceivers / 25G/40G Transceivers / 40G QSFP+ / 100276
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    Cisco WSP-Q40GLR4L Compatible 40GBASE-LR4L QSFP+ 1310nm 2km DOM Duplex LC SMF Optical Transceiver Module

    Product No: 100276
    1 Reviews
    162 Sold
    $83.90
    Compatible
    Transceivers type
    1,913 in real-time stock, 26Oct, 2026

    Free Shipping over US$ 79.8

    Global warehouses in stock

    30-day Return and Refund

    5-Year Warranty 30-Day Returns 90-Day 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.
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    1. Rate: 40G; Duplex LC Connector
2. DFB+PIN; Max. Power Consumption 3.5W
3. Applied in Campus Network and Data Center
4. Fully Compatible with 100+ Vendors
5. Compliant to SFF-8436 and QSFP MSA
    See more

    Specifications

    Cisco WSP-Q40GLR4L Compatible 40GBASE-LR4L QSFP+ Optical Transceiver Module (SMF, 1310nm, 2km, LC, DDM)

     

    The Cisco WSP-Q40GLR4L compatible 40G QSFP+ LR4L transceiver module is equipped with LC duplex connectors, reaching a link up to 2km over OS2 single-mode fiber (SMF). QSFPTEK manufactured Cisco WSP-Q40GLR4L compatible QSFP+ module is compliant with QSFP+ MSA standard. Besides, this module has been tested on host devices to ensure full compatibility with Cisco switches. The third-party 40G QSFP module is an ideal substitute for the OEM QSFP 40G transceiver at an affordable price, providing a cost-effective compatible solution for high-performance 40G Ethernet connectivity.

     

    Part Number QT-QSFP-IR4 Vendor Name QSFPTEK
    Form Factor QSFP+ Data Rate 40 Gbps
    Wavelength 1310nm Distance 2km@OS2
    Connector LC Duplex Cable Type OS2 SMF
    Transmitter Type DFB CWDM Receiver Type PIN
    TX Power -7~2.3dBm Receiver Sensitivity <-11.5dBm
    Power Consumption <3.5W Temperature 0 to 70°C (32 to 158°F)
    DDM Support Bit Error Ratio (BER) 1E-12
    Protocols 40G Ethernet, Fibre Channel, SATA/SAS3, MSA Compliant, SFF-8436 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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    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 most industry OEM devices. Ideal for data centers, campus networks, metro networks, etc.
    • 3. Protocols
      Compliant with IEEE 802.3ba, QSFP+ MSA, SFF-8436, SFF-8636, Infiniband 40G QDR standards.
    • 4. Quality Certifications
      Backed by CE, FCC, ROSH, ISO9001.

    Applications

    Scenario 1: 40GBASE-IR4 Connectivity

    40GBASE-IR4 Connectivity

     

     

    Scenario 2: 40GBASE-IR4 Connectivity with NIC

    40GBASE-IR4 Connectivity with NIC

     

     

    Scenario 3: 40GBASE-IR4 Connectivity with Adapter Panel

    40GBASE-IR4 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)
    • Can this module work at 80°C?
      No, it can't. The working temperature range is 0 to 70°C.
    • Does the qsfp-40g-sr4 transceivers allow 4x 10g connectivity?
      Yes. The connectivity is achieved by using an 8-fibers OM4 MTP-LC Type B break-out cable, which connects the qfp-40g-sr4 transceivers to four sfp-10g-sr optical interfaces.
    • What is the difference between Cisco qspf-40g-lr4 and qsfp-40g-lr4-s?
      They are actually the same one.

    Customer Reviews

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    5 stars

    1 Reviews

    4 stars

    0 Reviews

    3 stars

    0 Reviews

    2 stars

    0 Reviews

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    0 Reviews

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    Read reviews that mention

    • All (1)
    • Repurchse (1)
    • Good Price (1)
    • Lucy J. United States of America
      2024-09-13

      This is my third purchase from QSFPTEK. I think this is the right option for the 40G speed. The price is much cheaper than the original one and even cheaper than other third-party vendors that I used to cooperate with. This time I bought some ir4 for regular replacement and some cables for my new office setup.

      Transceivers typeWSP-Q40GLR4L

      CompatibleCisco

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    Resources

    • PDF Document
      QT-QSFP+-IR4 Datasheet.pdf
    • PDF Document
      Transceiver Module User Guide.pdf
    Check Test Reports on Target Device
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    Cisco WSP-Q40GLR4L Compatible 40GBASE-LR4L QSFP+ 1310nm 2km DOM Duplex LC SMF Optical Transceiver Module

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    Transceivers type WSP-Q40GLR4L

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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 WSP-Q40GLR4L Compatible 40GBASE-LR4L QSFP+ 1310nm 2km DOM Duplex LC SMF Optical Transceiver Module
    $83.90
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    Transceivers type
    WSP-Q40GLR4L
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    Cisco WSP-Q40GLR4L Compatible 40GBASE-LR4L QSFP+ 1310nm 2km DOM Duplex LC SMF Optical Transceiver Module

    Compatible Cisco

    Transceivers type WSP-Q40GLR4L

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