Arista 25GBASE-LR Enhanced Low-Latency SFP Transceiver Module, Single-Mode 10 km

Latency is what separates the Arista SFP-25G-LR-E from other 25G long-reach modules. The title says Enhanced Low-Latency, and it runs without FEC, at 25GbE over single-mode fiber for 10 km.

Timing-sensitive networks are the natural audience for a module that runs without FEC. Other buyers can compare it with a standard 25GBASE-LR optic, and the choice comes down to whether those latency savings matter to the application.

The SFP28 form factor fits 25G server and switch ports. Both ends of the link need to be set up for operation without FEC, so check your hardware's configuration. You can request it new, refurbished or used. Warranty is 1 year or 3 years for new and refurbished, and 90 days for used.