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

The BlueOptics SFP28-DAC-3M-LS-BL is a 3‑meter SFP28 Direct Attach Copper (DAC) cable with SFP28 male connectors on both ends designed for short‑reach, high‑speed links. It implements the 25GBase‑CR electrical interface and uses a passive twinax copper construction with 30 AWG conductors, offering a straightforward solution for connecting switches, routers and storage hardware in racks or between adjacent racks. The cable is MSA‑compliant and intended for environments that require low latency, low power consumption and predictable electrical performance.

Advantages

The cable provides a fixed, low‑latency 25 Gbps channel over a 3 m distance using a passive twinax design that does not require active electronics in the cable itself. Its SFP28 male‑to‑male terminations deliver a secure mechanical fit with standard SFP28 ports. MSA compliance ensures mechanical and electrical interoperability with hardware that supports SFP28 DACs. The cable’s passive nature keeps power draw minimal and the simple construction reduces points of failure for reliable operation in dense data‑center installations.

Suitable for

• Short‑reach 25 Gbps connections inside racks or between adjacent racks
• Interconnecting SFP28 ports on switches, routers or storage systems
• High‑performance ethernet, FCoE, Fibre Channel and InfiniBand links up to 25 Gbps
• Data‑center top‑of‑rack and adjacent‑rack cabling where low latency and low power are required

Key specifications

• Length: 3 meters
• Interface: SFP28 male to SFP28 male
• Data rate: up to 25 Gbps per lane
• Cable type: Passive twinax copper (DAC), 30 AWG
• Standards: 25GBase‑CR electrical interface, MSA compliant
• Typical power consumption: very low (passive design)
• Color: Blue

How to use

Install the cable by inserting each SFP28 connector into the matching SFP28 port on the two devices to be linked. Ensure both devices officially support passive SFP28 DAC connections and that ports are configured for the appropriate 25G protocol. Avoid sharp bends and excessive pulling on the cable; maintain recommended bend radius for twinax assemblies. For initial deployment, verify link status and throughput in the host equipment management interface to confirm successful negotiation and full 25 Gbps operation.

Recommendations

Use this 3 m passive SFP28 DAC for short, fixed connections inside racks or between adjacent racks where cost‑effective, low‑latency cabling is required. Confirm compatibility with your switch or storage vendor and consider requesting a test sample for verification in mixed‑vendor environments.