DAC cable CBO QSFP28-DAC-2M 2m passive copper QSFP28 to QSFP28

The BlueOptics DAC cable CBO QSFP28-DAC-2M is a 2-metre passive copper assembly that connects QSFP28 ports directly for short-reach 100GbE and compatible QSFP28 applications. Designed for use in high-density data center environments, this fixed copper cable eliminates the need for separate optical transceivers, providing a low-latency, power-efficient link between switches, routers and servers. The cable supports a straightforward plug-and-play installation and is intended for top-of-rack and adjacent-rack connections where cable length and signal integrity requirements are met.

Advantages

This passive DAC offers reduced power consumption compared with optical transceiver solutions because no active conversion is required. The fixed QSFP28-to-QSFP28 design simplifies cabling by providing a single integrated assembly that ensures consistent electrical performance and low latency. The short 2 m length is suitable for dense rack-to-rack or server-to-switch connections, helping to reduce clutter and improve airflow in racks. The cable is compatible with standard QSFP28 interfaces and is built to industry signal integrity expectations for 100GbE links.

Suitable for

• Short-reach 100 Gigabit Ethernet connections in data centers
• Direct QSFP28 port interconnects between switches, routers and servers
• Top-of-rack and adjacent-rack cabling where a 2 m passive cable meets distance needs
• Power-sensitive environments seeking lower link power consumption

Key specifications

• Connector type: QSFP28 to QSFP28
• Cable length: 2 metres
• Type: Passive copper Direct Attach Cable (DAC)
• Supported link: Up to 100GbE and compatible QSFP28 protocols
• Latency: Low, fixed electrical connection without transceiver conversion
• Usage environment: Data center short-reach interconnects

How to use

Install the cable by inserting each QSFP28 connector into the corresponding port on the devices until the latch engages. Ensure both ports support passive DAC connections and that the connected equipment is configured for the intended 100GbE or compatible link speed. Avoid sharp bends and maintain recommended bend radius for copper assemblies. If hot-plugging, follow device vendor guidelines; verify link status and interface settings in the host equipment after connection.

Recommendations

For reliable operation, use the 2 m passive DAC for short, direct interconnects inside racks or between adjacent racks. Confirm compatibility with your switch or server vendor and consult equipment documentation for supported passive QSFP28 assemblies. Avoid exceeding the cable’s intended distance and protect connectors from dust and mechanical stress when not in use.