Direct Attach Cable BlueOptics SFP28 25GBASE-CR 1m (844474-B21)

BlueOptics SFP28 Direct Attach Cable 25GBASE-CR 1m is a passive copper twinax assembly engineered for short-reach 25 Gigabit Ethernet links. The assembly is built for use with SFP28 ports and provides a direct electrical connection between switches, network interface cards and servers in data center racks. With a 1 meter length and SFP28 form factor, this Direct Attach Cable supports 25GBASE-CR signaling for low-latency, cost-effective interconnects where fiber is not required.

Advantages

This 1m BlueOptics SFP28 direct attach cable delivers predictable electrical performance for 25GBASE-CR applications, offering a compact, single-cable solution that eliminates the need for separate transceivers and patch cords. The passive twinax design lowers power consumption compared with active optics and reduces latency by maintaining an electrical link. The cable’s SFP28-compatible connectors ensure straightforward plug-and-play deployment in compatible ports and simplify inventory by using a standardized form factor.

Suitable for

• Short-reach 25 Gigabit Ethernet connections between top-of-rack switches and aggregation switches
• Direct links from servers or NICs to switches in high-density racks
• Spare or replacement interconnects in data center patching and cabling systems
• Environments prioritizing low latency and reduced power consumption for intra-rack links

Key specifications

• Connector type: SFP28-compatible twinax copper plugs
• Data rate: 25 Gigabit Ethernet (25GBASE-CR)
• Length: 1 meter
• Cable type: Passive twinax copper
• Application: Short-reach, intra-rack networking
• Latency profile: Low latency electrical interconnect

How to use

Insert each SFP28 connector into the corresponding SFP28 port on the network devices until the latch secures. Ensure both ends are fully seated and that ports are compatible with passive SFP28 direct attach cables. No additional configuration is required at the physical layer; devices will negotiate link parameters according to 25GBASE-CR standards. Inspect connectors for contamination before insertion and route the cable to avoid sharp bends that could stress the assembly.

Usage recommendations

Use the cable for short, direct electrical connections within a single rack or between adjacent racks. Verify switch and NIC compatibility with passive SFP28 twinax cables and confirm supported data rates in device documentation. For longer distances or where optical isolation is required, consider optical transceivers and fiber cabling instead.