Direct Attach Copper (DAC) Cable CBO QSFP28-DAC-1M 1 m Passive 100G

The BlueOptics Direct Attach Copper (DAC) Cable CBO QSFP28-DAC-1M is a 1-metre passive copper interconnect engineered for 100G networking. With QSFP28 connectors, this cable provides a direct, low-latency link between compatible switches, routers, servers and network interface cards within the same rack or adjacent cabinets. The design eliminates the need for optical transceivers where short-distance, high-bandwidth connections are required, offering a simple and cost-effective option for data centre interconnects and high-performance compute clusters.

Advantages

This passive DAC cable delivers reduced latency and reliable signal integrity for short-reach 100G links while keeping power consumption low because no active components or optical modules are required. Its fixed 1 m length simplifies cable management in dense rack environments and reduces the need for additional patch panels. The QSFP28 form-factor ensures broad compatibility with equipment that supports direct attach copper for 100 Gigabit Ethernet, enabling straightforward deployment and predictable performance.

Suitable for

• Short-reach 100G interconnects within the same rack or neighboring racks
• High-density switch-to-switch and switch-to-server connections in data centres
• Compute clusters and storage arrays requiring low-latency links
• Environments where optical transceivers are unnecessary or cost-prohibitive

Key specifications

• Interface: QSFP28 to QSFP28
• Length: 1 metre (fixed)
• Data rate: 100 Gbps
• Cable type: Passive copper direct attach
• Typical use: Short-reach, in-rack or adjacent-cabinet connections
• Power: No external power required for the cable

How to use

Ensure that both devices support QSFP28 direct attach copper connections and are configured for 100G operation. With devices powered down or following hot-plug guidelines from the equipment manufacturer, align and insert each QSFP28 connector into the corresponding port until the latch engages. Verify link status and speed through the device management interface and adjust port settings if necessary. For removal, release the latch and pull the connector straight out to avoid stressing the port or cable.

Recommendations

Use this 1 m passive DAC cable for short, high-bandwidth links inside racks or between adjacent cabinets. Avoid sharp bends, excessive pulling force, and exposure to liquids or extreme temperatures. For longer distances or connector type mismatches, select an appropriate optical transceiver and fibre cable instead.