Lenovo 10 GbE SW SFP+ Transceiver

SW stands for short wave, the optical wavelength class used by short-reach multimode links. The 49Y8578 is a 10GbE SFP+ transceiver of that kind, listed with Lenovo feature code 5721.

It fits an SFP+ port on a switch or adapter, and it is used for 10Gb links over multimode fiber inside a rack, row or small data room. Check the fiber and the host port before ordering. We can cross-check if you send the models on both ends.

Older part numbers like this one are common in spares lists for long-running clusters and storage systems. Matching the exact number to the original configuration is the safest way to avoid link-negotiation surprises.

The 49Y8578 is offered refurbished and used. No new offer is listed. Refurbished units carry a choice of 1 year or 3 years of warranty. Used units carry 90 days.