Cable DAC CBO BlueLAN QSFP28 SC282801L3M26 3M — Direct Attach Copper, 3 m

CBO BlueLAN QSFP28 DAC Cable SC282801L3M26 is a 3-meter Direct Attach Copper (DAC) assembly designed for QSFP28 interfaces. It provides a fixed twinax copper connection for short-range, high-speed links between network switches, servers and storage devices. The cable supports low-latency data transmission and is intended for top-of-rack and adjacent-rack connections in data center environments where a cost-effective, high-throughput copper solution is required.

Advantages

The Direct Attach Copper design ensures predictable latency and reliable signal integrity over short distances without the need for optical transceivers. The 3 m length offers flexibility for common rack and cabinet layouts while keeping signal loss minimal. Built to interface with QSFP28 ports, the cable simplifies deployment by enabling a plug-and-play connection that reduces hardware and power costs compared with active or optical alternatives.

Suitable for

• Top-of-rack connections between switches and servers
• Adjacent-rack links inside the same aisle or cabinet
• High-throughput, low-latency interconnects in data centers
• Short-range links in storage area networks (SAN) and HPC clusters

Key specifications

• Interface type: QSFP28 compatible twinax copper
• Cable type: Direct Attach Copper (twinax)
• Length: 3 meters
• Designed use: short-range, high-speed data center interconnects
• Latency profile: low-latency physical connection suitable for 100G links
• Form factor: QSFP28 connector ends for direct port mating

How to use

Insert each QSFP28 connector end into the corresponding QSFP28 ports on the devices to be connected, ensuring secure seating and latch engagement. No separate transceivers or additional power are required; the cable functions as a fixed copper link. Verify device compatibility with QSFP28 passive DAC connections and confirm firmware or port settings if necessary to enable the expected link speed and lane configuration. For initial deployment, test the link status and throughput using standard network diagnostics on connected equipment.

Recommendations

Use this 3 m DAC cable for short, direct connections inside racks or between adjacent racks. Avoid sharp bends, kinks or excessive strain on the twinax cable, and maintain recommended bend radius to preserve signal integrity. Keep connectors clean and protect unused ports with dust caps. For distances beyond short-range top-of-rack or adjacent-rack links, consider active copper or optical fiber alternatives.