CBO DAC cable QSFP28-DAC-1M 1m passive copper QSFP28 to QSFP28

CBO DAC cable QSFP28-DAC-1M is a 1-meter passive copper direct attach cable for QSFP28 ports. It provides a low-latency, short-reach connection for devices that support QSFP28 interfaces and 100 Gigabit Ethernet applications. The fixed, factory-terminated assembly plugs directly into compatible QSFP28 ports and requires no additional transceivers, offering a compact, cost-efficient link ideal for dense data center topologies and server or switch interconnects.

Advantages

The passive copper construction reduces power consumption compared with active optical solutions and delivers predictable latency and signal integrity over short distances. Being a direct attach cable, it simplifies installation with plug-and-play operation and eliminates the need to manage separate transceiver modules. The 1 m length balances reach and cable management requirements in rack-to-rack or top-of-rack deployments.

Suitable for

• Short-reach 100GbE connections between switches
• Server-to-switch direct links in high-density racks
• Top-of-rack and patching applications within the same equipment room
• Environments where reduced power draw and low latency are priorities

Key specifications

• Connector type: QSFP28 to QSFP28
• Cable type: Passive copper direct attach
• Nominal length: 1 meter
• Supported application: 100 Gigabit Ethernet and compatible QSFP28 protocols
• Deployment: Short-reach, within-rack and adjacent-rack interconnects

How to use

Insert each QSFP28 plug into the corresponding QSFP28 port on the two devices until the latch secures. Ensure both devices are powered and configured for the required 100GbE link settings; most systems will auto-negotiate when a compatible DAC is detected. Route the 1 m cable to avoid sharp bends and excessive compression; maintain recommended bend radius and secure the cable to prevent strain on the connectors. If link does not come up, verify port compatibility, firmware settings, and device support for passive DACs.

Recommendations

Use this 1 m passive QSFP28 DAC for short-distance interconnects inside racks or between adjacent racks. Avoid exposing the cable to electrical interference and maintain clear access to QSFP28 ports for insertion and removal. For longer distances or fiber compatibility requirements, consider optical transceivers and fiber cabling instead.