SFP28 DAC Cable BlueOptics SFP28-DAC-3M-LO-BL 3m Male/Male

The BlueOptics SFP28-DAC-3M-LO-BL is a 3 m SFP28 direct attach (DAC) twinax cable with SFP28 male connectors on both ends. Designed for short-reach, high-speed connections in racks and between adjacent racks, this passive 25G twinax copper cable supports 25GBase-CR electrical transmission and is intended for use with SFP28 ports on switches, servers and storage devices. The cable is MSA-compliant and built to industry standards for compatibility with major hardware platforms that support SFP28 DAC links.

Advantages

This SFP28 DAC cable provides low-latency, low-power connectivity suitable for short-distance links. As a passive twinax solution, it does not require active electronics in the cable, which reduces power consumption and potential failure points. The 3 m length is suitable for rack-to-rack or within-rack connections, and the MSA-compliant design ensures interoperability with a wide range of SFP28-capable equipment. Materials and construction follow industrial quality practices to deliver consistent electrical performance for Ethernet, FCoE, Fibre Channel and InfiniBand applications up to 25 Gbit/s.

Suitable for

• Connecting top-of-rack switches to servers and storage within the same rack
• Linking adjacent racks in data centers for short-reach 25G links
• Low-latency interconnects for storage area networks and compute clusters
• Environments that require MSA-compliant SFP28 direct attach connections

Key specifications

• Connector type: SFP28 male to SFP28 male
• Length: 3 metres
• Transmission rate: up to 25 Gbit/s
• Cable type: passive twinax copper (DAC)
• Wire gauge: 30 AWG
• Standards compliance: SFP28 MSA, supports 25GBase-CR electrical interface
• Typical power consumption: passive (near 0 W in-cable)

How to use

Verify that both devices have SFP28 ports that support passive DAC twinax cables. With power off or per your equipment vendor’s hot-plug guidance, insert one SFP28 connector into each SFP28 port until the latch clicks. Ensure the cable is routed without sharp bends and that the 3 m length matches the intended rack layout. After insertion, confirm link status on both devices and verify negotiated speed (25 Gbit/s) and protocol compatibility for Ethernet, FCoE, Fibre Channel or InfiniBand as required.

Recommendations

Use the cable for short-range connections (within a rack or between adjacent racks) and avoid exposure to excessive mechanical stress or extreme temperatures. For best results, follow your hardware vendor’s guidelines for passive DAC usage and test the link in your environment to confirm compatibility and performance prior to deployment in critical systems.