DAC cable CBO QSFP28-DAC-1M 1 m passive copper 100Gbps QSFP28

Passive Direct Attach Copper (DAC) cable CBO QSFP28-DAC-1M is a 1-meter QSFP28 copper interconnect engineered for 100Gbps links. It connects QSFP28 ports directly between switches, routers and servers without optical transceivers, offering a compact, low-latency and power-efficient physical layer solution for short-reach environments such as data center top-of-rack and rack-to-rack connections.

Advantages

This passive copper cable provides a fixed-length, plug-and-play connection that eliminates the need for separate transceivers, reducing component count and simplifying inventory. The QSFP28 form factor supports 100Gbps throughput with minimal latency and low power consumption compared with active or optical solutions for short distances. Its 1 m length is optimized for dense rack layouts, offering reliable electrical performance and straightforward installation.

Suitable for

• Short-reach 100Gbps links between switches in the same rack or adjacent racks
• Direct server-to-switch connections where QSFP28 ports are available
• High-density data center environments requiring low-latency, power-efficient interconnects

Key specifications

• Connector type: QSFP28 to QSFP28 copper direct attach
• Length: 1 meter
• Data rate: up to 100 Gbps
• Transmission medium: passive copper twinax cable
• Latency: minimal electrical latency suitable for short links
• Power: passive design with no additional power draw for transceiver modules

How to use

Insert each QSFP28 connector into the corresponding port on the network devices until the latch clicks into place. Ensure both devices are powered and configured to enable the 100Gbps link; link negotiation typically completes automatically. For best results, route the cable to avoid sharp bends and mechanical strain on connectors. If link status LEDs do not indicate a connection, verify port configuration and compatibility with the device vendor’s QSFP28 specifications.

Recommendations

Use this 1 m passive QSFP28 DAC cable for short intra-rack and adjacent-rack connections where a fixed-length, low-power 100Gbps link is required. Avoid exceeding recommended bend radii, keep connectors free of dust, and store unused cables in a clean, dry place to maintain signal integrity and connector reliability.