DAC SFP kabel BlueOptics DAC-SFP-25G-2M-BL 2 m SFP28 samec-samec

The BlueOptics DAC-SFP-25G-2M-BL is a 2 meter passive direct attach copper (DAC) cable with SFP28 male-to-male connectors. Designed for short-distance, high-speed links in racks and between adjacent racks, this SFP28-to-SFP28 twinax cable supports 25GBase-CR applications and carries electrical signals for Ethernet, FCoE, Fibre Channel and InfiniBand where the connected hardware supports passive 25G DACs. The cable is MSA-compliant and uses 30 AWG conductors in a 2 m length with a compact form factor and low weight.

Advantages

The cable provides a low-latency, low-power connection for short links and requires no external transceivers or added power for passive operation. Being MSA-compliant and made with high-quality components, it offers broad compatibility with major hardware platforms that support SFP28 passive DACs. Its twinax copper construction and short 2 m length reduce signal loss and overall system cost compared with active or optical alternatives.

Suitable for

• Top-of-rack and adjacent-rack switch-to-switch connections
• Server-to-switch and storage-to-switch links within the same rack
• High-throughput fabrics using 25 Gb/s Ethernet, FCoE or InfiniBand
• Short-range connections in data centers and network closets

Key specifications

• Connector type: SFP28 male to SFP28 male
• Supported data rate: up to 25 Gbps
• Cable type: passive twinax copper (DAC)
• Conductors: 30 AWG
• Length: 2 m
• Colour: black and silver
• Weight: approx. 0.08 kg

How to use

Verify that both devices support passive SFP28 DAC cables and the 25GBase-CR protocol. With link equipment powered off or following hot-plug guidance from your hardware vendor, align the SFP28 connectors and insert each end into the corresponding SFP28 ports until they latch. After insertion, enable or verify the port configuration in your switch/router/server software, monitor link status and run basic connectivity tests to confirm full operation at 25 Gbps.

Recommendations

Use this 2 m DAC for short point-to-point connections inside racks or between adjacent racks. Avoid repeated bending near the connector boots, maintain appropriate cable bend radius as specified by the hardware vendor, and ensure the connected ports are compatible with passive twinax SFP28 modules. For longer distances or fiber-required routes, choose appropriate optical transceivers and fiber patching instead.