STARTECH 

STARTECH QSFP40LR4ST 40GBase LR4 QSFP SM

Mfg Part Number:  QSFP40LR4ST  
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Price: $1,935.05 + Free Shipping
Quantity:
In Stock: 45
Last Updated: Oct 16, 2025
No Sales Tax except these states
, PO and Wire.

The QSFP40LR4ST is an MSA compliant fiber QSFP+ transceiver that's designed, programmed and tested to work with 40GBASE-LR4 compatible MSA switches and routers. The QSFP+ transceiver module supports a maximum distance of up to 10 km (6.2 mi) and delivers dependable 40 GbE connectivity over fiber cabling.

Technical Specifications:

  • Wavelength: 1270nm to 1330nm
  • Maximum Data Transfer Rate: 40 Gbps
  • Type: Single Mode Fiber
  • Connection Type: LC Connector
  • Maximum Transfer Distance: 10 km (6.2 mi)
  • MTBF: 1,489,426 hours
  • Power Consumption: Less than 2.5 Watts
  • DDM: Yes

This QSFP+ fiber module is hot-swappable, making upgrades and replacements seamless by minimizing network disruptions.

StarTech.com SFPs

All StarTech.com SFP & SFP+ transceiver modules are backed by a lifetime warranty and free lifetime multilingual technical support. StarTech.com offers a wide variety of SFP modules and direct-attach SFP Cables, providing the convenience and reliability you need to ensure dependable network performance.

Main Specification
General Information
Manufacturer StarTech.com
Manufacturer Part Number QSFP40LR4ST
Manufacturer Website Address http://www.startech.com
Brand Name StarTech.com
Product Name QSFP+ Module
Packaged Quantity 1 Each
Product Type QSFP+
Technical Information
Application/Usage Data Networking
Application/Usage Optical Network
Interfaces/Ports
Total Number of Ports 1
Connector Type LC
Interfaces/Ports Details 1 x LC Duplex 40GBase-LR4 Network
Media & Performance
Media Type Supported Optical Fiber
Fiber Mode Supported Single-mode
Ethernet Technology 40 Gigabit Ethernet
Network Technology 40GBase-LR4
Physical Characteristics
Form Factor Hot-swappable
Height 0.5"
Width 0.7"
Depth 2.8"
Weight (Approximate) 0.09 lb
Miscellaneous
Compatibility MSA Compliant
Country of Origin China
Environmentally Friendly Yes
Environmental Compliance Registration, Evaluation, Authorization and Restriction of Chemicals (REACH)
Environmental Compliance Restriction of Hazardous Substances (RoHS)
Environmental Compliance Waste Electrical and Electronic Equipment Directive (WEEE)
Warranty
Limited Warranty Lifetime
WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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