40 Gbps | Single Mode Fiber | LC | 10 km (6.2 mi) | Lifetime Warranty. The QSFP40GLR4S is a Cisco QSFP-40G-LR4-S compatible fiber transceiver module that has been designed, programmed and tested to work with Cisco brand switches and routers. It delivers dependable 40 GbE connectivity over fiber cable, for 40GBASE-LR4 compliant networks, with a maximum distance of up to 10 km (6.2 mi).
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
Digital Diagnostics Monitoring (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.
- 100% compatibility with Cisco QSFP-40G-LR4-S guaranteed
- StarTech.com SFP modules are backed by a lifetime warranty
- Meets or exceeds OEM specifications and Multi-Source Agreement (MSA) industry standards
Reliable performance
This QSFP+ transceiver module delivers a data transfer rate of 40 Gbps, ensuring fast and efficient data handling for various networking applications.
Extended distance capability
The module allows for a maximum transfer distance of 10 km, enabling reliable long-range connectivity without signal degradation.
Durable environmental resistance
Designed to operate in temperatures ranging from 0°C to 70°C and resilient to humidity levels from 5% to 95%, this module is suitable for diverse conditions.
Enhanced monitoring features
With Digital Diagnostics Monitoring (DDM) and Digital Optical Monitoring (DOM) support, users can efficiently track and manage their network performance.
Robust compliance standards
This module adheres to several compliance standards, including RoHS, MSA, UL, FCC, and IEEE 802.3ba, ensuring reliability and quality in performance.



