InfiniBand/fibre optic cable BlueOptics X66240A-3-BL 3 m SFP28

The BlueOptics X66240A-3-BL is a 3 m InfiniBand/fibre optic cable with SFP28 connectors on both ends, designed for short-range high-speed interconnects in racks and adjacent rack systems. Engineered for compatibility with SFP28 ports, this cable supports 25G data transfer modes and is suitable for electrical direct-attach twinax applications where SFP28 to SFP28 connectivity is required. The 3 meter length provides a balance between flexible rack layout and low-latency direct connections for switches, storage systems and servers.

Advantages

The cable combines SFP28 connector compatibility with a 3 m reach to enable straightforward direct connections between rack-mounted devices. It supports up to 25G per lane, offering reliable signal transmission for Ethernet, FCoE and InfiniBand applications on short distances. Constructed to industry MSA guidelines, the design minimizes power consumption and latency while providing a cost-effective alternative to active optical modules for short-range links.

Suitable for

• Direct connections between switches within the same rack or adjacent racks
• Server-to-switch or server-to-storage links requiring SFP28 ports
• Low-latency 25G Ethernet, Fibre Channel over Ethernet (FCoE) and InfiniBand short-range links
• Data center top-of-rack and middle-of-row cabling with 3 m reach

Key specifications

• Cable type: direct-attach twinax (passive twinax copper for short-range electrical transmission)
• Connector type: SFP28 to SFP28
• Length: 3 meters
• Data rate support: up to 25 Gbit/s per lane (25GBase-CR compatible)
• Wire gauge characteristic: 30 AWG construction for short-range signal integrity
• Compliance: designed to MSA-compatible SFP28 mechanical and electrical specifications

How to use

Ensure both devices have SFP28 ports that support passive direct-attach twinax cables and the intended 25G protocol. With both devices powered down or operating per vendor guidance, align the SFP28 connectors and insert each end until the latch engages. Verify link status on connected devices and configure network interfaces or switch ports to the matching 25G mode, duplex and protocol settings. For removal, press the connector latch and pull straight out to avoid stressing the cable assembly.

Recommendations

Use this 3 m SFP28 direct-attach cable for short, rack-to-rack or intra-rack high-speed links where low latency and low power consumption are priorities. Avoid tight bends and protect the cable from sharp edges and high-traffic pathways. Confirm vendor compatibility with passive twinax SFP28 cables and the target devices' firmware or hardware support for 25G passive DAC connections.