SFP28 Twinax Direct Attach Cable CBO SFP28-DAC-3M-EE-BL 3 m Male-to-Male 25 Gbit/s

The BlueOptics SFP28 Twinax Direct Attach Cable SFP28-DAC-3M-EE-BL is a 3 meter copper twinax cable with male-to-male SFP28 connectors designed for short-reach 25 Gbit/s links. It provides a fixed, low-latency connection option for data center equipment such as switches, network interface cards (NICs) and servers where a cost-effective, energy-efficient high-speed link is required. The cable is intended for direct connection between compatible 25GbE ports without the need for optical transceivers or patch panels.

Advantages

This SFP28 twinax DAC offers a low-power, low-latency physical connection that reduces both heat and power consumption compared with active optical solutions. The integrated male-to-male SFP28 connectors simplify installation and eliminate the need for separate transceivers, lowering total hardware cost. With a fixed 3 m length, the cable provides predictable signal integrity for short-reach links inside racks or between adjacent racks and is suitable for environments that prioritise straightforward, high-bandwidth connectivity.

Suitable for

• Direct connections between 25GbE-capable switches
• Server to NIC links in rack-mounted systems
• Short-reach interconnects in data center top-of-rack and leaf-spine deployments
• Cost-sensitive high-speed links where optical transceivers are not required

Key specifications

• Connector type: Male SFP28 to Male SFP28
• Cable type: Copper twinax
• Nominal data rate: 25 Gbit/s
• Length: 3 meters
• Intended reach: Short-reach, within or between adjacent racks
• Latency: Low, suitable for latency-sensitive applications
• Power: Passive/low-power direct attach design

How to use

Insert each SFP28 connector into the corresponding SFP28 port on the devices to be connected, ensuring correct orientation and a secure latch engagement. Use the cable for direct device-to-device links where both ports support 25GbE and SFP28 form factor. Avoid excessive bending or mechanical strain on the cable near the connectors and route the cable to prevent sharp edges or pinch points. Verify link status on connected devices and consult device documentation for any port configuration or firmware requirements.

Recommendations

For reliable operation, confirm compatibility of the SFP28 ports with passive twinax DACs and use this 3 m cable for short interconnects within racks or between adjacent racks. Maintain bend radius within manufacturer guidelines, avoid prolonged exposure to high temperatures, and replace the cable if connector latches or the cable jacket show damage. Use in environments where reduced power consumption and low latency are priorities.