Cisco 25GBASE-CR1 SFP28 Passive Copper Direct Attach Cable, 5 m

Five meters of passive copper with SFP28 connectors on each end make the Cisco 25GBASE-CR1 SFP28 Passive Copper Direct Attach Cable, part number SFP-H25G-CU5M, a longer reach than a 1 m cable. It runs at 25GbE.

That extra length covers servers a few positions away from the switch in a rack, or links to a neighboring rack. Passive copper remains attractive at this length because there are no optical modules to buy and no fiber to clean, though it is thicker than an optical cable.

Measure before you order. Real cable paths run longer than the straight-line distance between ports, especially through cable arms and vertical managers. If your route exceeds the rated length, you need a different media, such as an active optical cable or a transceiver pair with fiber.

Host support is the last check. Some platforms restrict which direct attach cables they accept, so consult the documentation for both the adapter and the switch.

The SFP-H25G-CU5M is offered new, refurbished and used. New and refurbished units have 1 year or 3 years of warranty, and used units have 90 days. Send your quantity and platforms for pricing.