Arista QSFP-40G-SR4 40GB BASE-SR4 850nm Short Reach MMF QSFP+ Transceiver

The Arista QSFP-40G-SR4 is a QSFP+ 40GBASE-SR4 optical transceiver for 40G links over parallel multimode fiber. It transmits at 850nm. It reaches up to 100 meters on OM3 and 150 meters on OM4 and uses an MPO-12 UPC connector.

It is the standard short-reach 40G optic for links inside a data center. Use a matching 40GBASE-SR4 optic at the far end of the link unless Arista lists the pairing above, and use multimode patch cables of the grade your reach requires.

If you need a different reach, the QSFP-40G-UNIV 40G Universal transceiver and the QSFP-40G-XSR4 40GBASE-XSR4 transceiver are also available. A new QSFP-40G-SR4 is also available.

Arista publishes a transceiver compatibility guide that lists which switch platforms and EOS releases support each module, so check it for your switch before you order.

OM3 and OM4 multimode patch cables are normally aqua, and some OM4 cables are violet. Check that every patch cord and panel in the path matches the fiber grade your reach requires.

Keep the dust caps on the optic and the fiber until you are ready to connect them, and clean the connector end faces before you plug them in. Most failed optical links come down to a dirty connector.

This seller refurbished QSFP-40G-SR4 is tested, working, and covered by the NetworkTigers one-year warranty.