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    Home / Products / Transceivers / 25G/40G Transceivers / 40G QSFP+ / 100035

    Cisco QSFP-4X10G-LR-S Compatible 40GBASE-PSM4 QSFP+ 1310nm 10km MTP/MPO Optical Transceiver Module

    Product No: 100035
    17 Reviews
    405 Sold
    US$ 106.90  US$ 129.00
    Compatible
    Transceivers type
    1312 in real-time stock, 13 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.
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    1. Rate: 40G; Connector: MTP/MPO-12 Male; 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-4X10G-LR-S Compatible 40GBASE-PSM4 QSFP+ Optical Transceiver Module (SMF, 1310nm, 10km, MPO, DDM)

     

    The Cisco QSFP-4X10G-LR-S compatible 40G QSFP+ transceiver module is equipped with MTP/MPO connector, reaching a link up to 10km over single-mode fiber (SMF). The Cisco QSFP-4X10G-LR-S compatible module is verified to interoperate with original Cisco switches, including the Catalyst 9300//9300LM/9400/9500/9600 series, Meraki MS425 series and Nexus 9300/9500 series switches. It also supports breakout to 4x10GBASE-LR SFP+ via MTP/MPO-8 to 4xLC duplex OS2 breakout cables. 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-PSM4 QSFP+ module is compliant with QSFP+ MSA and IEEE 802.3ba 40GBASE-PSM4 specifications. Besides, the QSFP PSM4 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 for the Cisco QSFP-4X10G-LR-S 40G transceiver at an affordable price, providing a cost-effective compatible solution for high-performance 40G connectivity.

     

    PSM4 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.

     

    Part Number QT-QSFP+-LR4-PSM4 Vendor Name QSFPTEK
    Form Factor QSFP+ Data Rate 40 Gbps
    Wavelength 1310nm Distance 10km
    Connector MTP/MPO-12 Male Cable Type SMF
    Transmitter Type 4x DFB Receiver Type PIN
    TX Power -6~-1dBm Receiver Sensitivity <-14.4dBm
    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

    Data Center 40 Gigabit Ethernet Direct Connection Solution:

    Data Center 40G PSM4 Gigabit Ethernet Direct Connection Solution

      

     

    40GBASE-PSM4 to 4x 10G Breakout Connection Solution:

    40GBASE-PSM4 to 4x 10G Breakout Connection Solution

      

    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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    • ALL (8)
    • Excellent Quality (2)
    • Shopping Experience (1)
    • Plug-and-Play (1)
    • Stable (1)
    • Easy to use (1)
    • High Reliability (1)
    • Compatibility (1)
    • Fast Delivery (1)
    • High Performance (4)
    • Robert United States of America
      2026-02-28

      This 40GBASE-PSM4 QSFP+ module supports breakout to 4×10GBASE-LR SFP+ via an MTP/MPO-8 to 4×LC duplex OS2 breakout cable, which adds great flexibility for connecting to 10G devices.

      Transceivers typeQSFP-4X10G-LR-S

      CompatibleCisco

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    • Kenh United States of America
      2025-12-26

      Works perfectly with our Cisco switch. The module was recognized immediately and delivered stable 40G performance over our single-mode fiber link. a great cost-effective alternative to original modules.

      Transceivers typeQSFP-4X10G-LR-S

      CompatibleCisco

      Verified Purchase

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      0

    • Eric United States of America
      2025-11-06

      As a company specializing in radio and television information integration, our devices demand optical modules with particularly high safety and performance standards. We tested samples from several other vendors, but none met our requirements. Finally, we chose QSFPTEK, and they exceeded our expectations.

      Transceivers typeQSFP-4X10G-LR-S

      CompatibleCisco

      Verified Purchase

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      0

    • Howard W. United States of America
      2025-09-12

      We needed to establish a 10km link between two data centers using Cisco N9K-C93180YC-EX switches. The compatibility is seamless; it plugged in and worked instantly without needing any commands to force the speed or disable error messaging.

      Transceivers typeQSFP-4X10G-LR-S

      CompatibleCisco

      Verified Purchase

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    • Hain United Kingdom
      2025-08-22

      The setup was straightforward, and the modules integrated seamlessly into our existing network. Performance has been very consistent, with stable connections even under heavy workloads.

      Transceivers typeQSFP-4X10G-LR-S

      CompatibleCisco

      Verified Purchase

      Helpful

      0

    • Davies United States of America
      2025-07-04

      Thank you for always responding promptly and professionally to my orders and questions. I’m impressed with your 40GBASE-PSM4 modules—great quality, fair prices, and fast delivery. Your website also makes it easy to find exactly what I need.

      Transceivers typeQSFP-4X10G-LR-S

      CompatibleCisco

      Verified Purchase

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      0

    • Alex Gabriel United States of America
      2025-05-09

      We deployed the 40G PSM4 QSFP+ modules for our data center interconnects, and they exceeded expectations. The 1310nm 10km transmission worked perfectly over single-mode MTP fiber.

      Transceivers typeQSFP-4X10G-LR-S

      CompatibleCisco

      Verified Purchase

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      0

    • Zephaniah United States of America
      2024-10-24

      I used this module to build a breakout connection, this module is perfectly compatible with my Cisco switch with no additional operations, the price is quite cheap compared to branded optical modules, and the quality is comparable to the original modules in my opinion.

      Transceivers typeQSFP-4X10G-LR-S

      CompatibleCisco

      Verified Purchase

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      0

    Resources

    • PDF Document
      QT-QSFP+-LR4-PSM4 Datasheet.pdf
    • PDF Document
      Transceiver Module User Guide.pdf
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    Cisco QSFP-4X10G-LR-S Compatible 40GBASE-PSM4 QSFP+ 1310nm 10km MTP/MPO Optical Transceiver Module

    Compatible Cisco

    Transceivers type QSFP-4X10G-LR-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-4X10G-LR-S Compatible 40GBASE-PSM4 QSFP+ 1310nm 10km MTP/MPO Optical Transceiver Module
    US$ 129.00
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    Cisco
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    QSFP-4X10G-LR-S
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    Cisco QSFP-4X10G-LR-S Compatible 40GBASE-PSM4 QSFP+ 1310nm 10km MTP/MPO Optical Transceiver Module

    Compatible Cisco

    Transceivers type QSFP-4X10G-LR-S

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