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Customized QSFP+ 40GBASE-LR4 1310nm 10km DOM Duplex LC SMF Optical Optical Transceiver Module


≤3.5W Duplex LC SMF

4K Solds
42 Reviews
0 Question
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1312 in U.S. Warehouse, Get it by 25 Jun, 2024
653 in Global Warehouse, Get it by 01 Jul, 2024
1 in Transit, Get it by 08 Jul, 2024
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Deliver to New York, 10010
Free Shipping via UPS Ground®
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Solution Design
Product Development
5-Year Warranty

40GBASE-LR4 QSFP+ Optical Transceiver Module for Ethernet and Data Center (SMF, 1310nm, 10km, LC, DOM)

The 40GBASE-LR4 QSFP+ Optical Transceiver Module is designed for use in 40GBASE Ethernet throughput up to 10km over single mode fiber (SMF) using a wavelength of 1310nm via duplex LC connectors. This transceiver is compliant with QSFP+ MSA and IEEE 802.3ba 40GBASE-LR4 and OTU3 C4S1-2D1 standard. Digital diagnostics functions are also available via the I2C interface, as specified by the QSFP+ MSA, to allow access to real-time operating parameters. With these features, this easy to install, hot swappable transceiver is suitable to be used in various applications, such as data centers, high-performance computing networks, enterprise core and distribution layer applications.

Part Number
Vendor Name
Form Factor
Max Data Rate
44.6Gbps (4×11.2Gbps)
Max Cable Distance
Duplex LC
Transimitter Type
Receiver Type
TX Power
Receiver Sensitivity
Receiver Overload
Power Consumption
Extinction Ratio
Host FEC
Bit Error Ratio (BER)
Commercial Temperature Range
0 to 70°C (32 to 158°F)
OTN OTU3, 40G Ethernet, Fiber Channel, SATA/SAS3, MSA Compliant
Quality Certifications
To get the detailed certification, please go to the Product Compliance Status for download.
Please Note: Installing a third party transceiver does not void your network equipment warranty. Network equipment manufacturers all have guidelines stating that warranty support on their products will not be affected.
Connectivity Solutions
Transceiver Customization for Full Compatibility
Configuring with FS BOX or Coding Board and testing in the targeted switch environment for high-performance interoperability.
Custom Compatible Brands
100% Tested in Host Devices
Online Custom Label Service Tailored to Your Needs
Custom labels for easy identification to help ease receiving, stocking and deployment.
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Colored Black and White or Neutral Labels
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Brand Logo, P/N, S/N, Vendor Name
Comprehensive Testing Increases Reliability
Qualified through a rigorous process with advanced equipments to ensure you get the high quality and reliable optics.
Optical Spectrum Test
No Packet Loss & CRC
Eye Pattern Test
Mask Margin >20%
Bit Error Rate Test
BER 1E-12
Temperature Test
Custom Products Tailored to Your Needs
Diverse Custom Options
Choose suitable options based on your applications.
Strict Quality Control
Ensure high quality products with state of testing facility.
Technical Support
Get support from professional engineer team.
Questions & Answers
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Customer Reviews
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July 08, 2021
Our company has bought FS fiber cables and patch panels before. They performed well. So we decided to try FS modules when our old ones had been broken.
Ordered these to connect two Cisco switches with fiber in a building to building run. We plugged some of them on our new hardware, and others on the old switches. The switches can recognize the modules without issue. All could run well with the hardware. They function like our old original modules, really good.
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Helpful 19
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United States

June 11, 2021
We ordered OEO, DWDM Mux/Demux, and other fiber accessories. All products were delivered promptly and accurately with solid packages, with no damages at all. Thanks for your helpful remote support, we finally had all the devices and products deployed, no issues so far. These transceiver modules work well on our juniper qfx5100-48s-6q switches which are connected onto the remote juniper qfx10002, and save us a ton of cash from having to purchase the original transceiver modules. Keep up the good work!
Verified Purchase
Helpful 12
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United States

March 18, 2021
Firstly I ordered BD module for my switch, but found it couldn’t work well. I thought it was the quality problem of the module, my Account Manager and FS technical team told me actually my switch doesn't support BD module and suggested I choose LR4 module. So I exchanged the module. FS is right! The LR4 modules work fine! Many thanks for their help, FS team is really professional. They suggest I remark the switch model when I place an order in the future, then they can proceed to test for me accordingly.
Verified Purchase
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