25G SFP28 Module 25GBASE-LR LC Single-Mode Transceiver - 10km Range

In this review the QSFPTEK 25G SFP28 Module is evaluated as a practical, cost-conscious option for data center and telecom engineers who need reliable 25GBASE connectivity. The single biggest reason to buy is its straightforward compatibility with Arista Networks SFP-25G-LR ports and the promise of tested, hot-pluggable performance that reaches up to 10km over single-mode fiber. For teams replacing or scaling 25G ethernet links, this transceiver offers a dependable, standards-compliant choice without unnecessary complexity.

Key Features

• Compatibility: Works with Arista Networks SFP-25G-LR ports, making it easy to swap modules in mixed environments.
• 25G Performance: Supports 25Gb/s data rate with a 1310nm wavelength, providing a full 25GBASE Ethernet option for switches, NICs, and routers.
• 10km Reach: Single-mode LC duplex connector delivers up to 10km reach, suitable for many metro and data center interconnects.
• Monitoring: Built-in DDM lets administrators read Tx/Rx and other diagnostics to spot issues before they become failures.
• Operating Range: Rated for 0C to 70C operation and tested for Tx power and Rx sensitivity to fit common equipment environments.
• Plug and Play: Hot-pluggable SFP28 form factor simplifies upgrades and replacement without downtime for many deployments.

Who It's For

This module is best for network engineers, data center operators, and telecommunications teams who need a standards-compliant 25G SFP28 transceiver for aggregation or server connectivity. It is particularly useful where compatibility with Arista SFP-25G-LR is required and where a 10km single-mode link is the target.

Those who should look elsewhere include users needing multimode fiber support, links longer than 10km, or modules rated for extreme temperatures below 0C. Buyers requiring vendor-specific firmware locking or proprietary modules should verify compatibility first.

Pros & Cons

Pros

• Solid 25Gb/s throughput with 1310nm optics for standard 25GBASE Ethernet deployments.
• DDM support provides useful diagnostics for maintaining link health.
• Hot-pluggable LC form factor and broad device compatibility simplify installation and replacement.
• Individually tested before shipping gives confidence in out-of-box operation.

Cons

• Limited to single-mode fiber and 10km reach, so it is not suitable for multimode short-reach needs or longer metro links.

Specifications

Data Rate	25Gb/s
Wavelength	1310nm
Reach	Up to 10km
Connector	LC duplex
DDM	Yes
Tx Power (dBm)	-7 to +2
Operating Temp	0C to +70C

Our Verdict

The QSFPTEK 25G SFP28 25GBASE-LR transceiver is a practical, no-frills module for anyone needing reliable 25G single-mode links up to 10km, especially in environments using Arista SFP-25G-LR ports. With DDM monitoring, tested quality control, and a broad compatibility stance, it delivers strong value for data center and telecom teams replacing or scaling 25G links, provided their network uses single-mode fiber and does not require longer reach.

Frequently Asked Questions

Will this module work with Arista switches?
Yes, it is listed as compatible with Arista Networks SFP-25G-LR ports and is designed to plug into standard SFP28 ports.

How far can it transmit?
The transceiver supports up to 10km over single-mode fiber at 1310nm wavelength.

Does it provide diagnostic monitoring?
Yes, the module supports DDM so you can monitor Tx power, Rx power, and other link parameters.