DAC cable CBO compatible with Palo Alto Networks QSFP28 to 4×SFP28, 3 m

Passive Direct Attach Copper (DAC) cable by BlueOptics provides a short-range, low-latency physical connection converting one QSFP28 port into four SFP28 ports over a 3 meter copper assembly. This CBO-compatible QSFP28 to 4×SFP28 breakout cable is designed for 25GbE links and is suitable for data center topologies where breakout DACs are supported by the switch or appliance. The cable implements a fixed, factory-terminated solution that eliminates the need for separate transceivers and fiber patching in close-proximity rack and chassis connections.

Advantages

The BlueOptics DAC offers low latency and low power consumption compared with active optical alternatives, with predictable electrical performance for short-reach interconnects. As a passive copper breakout, it reduces component count and simplifies cable management while providing a cost-effective way to extend a QSFP28 port into four independent 25GbE links. The 3 m length balances reach for common rack-to-rack or within-rack installations without introducing excess slack.

Suitable for

• Data centre switch uplinks and server connections where QSFP28 breakout is required
• Firewall and security appliance ports supporting DAC breakout to multiple SFP28 links
• Aggregation, leaf-spine and top-of-rack deployments with short-reach 25GbE links

Key specifications

• Connection: QSFP28 to 4 × SFP28 breakout
• Length: 3 meters
• Cable type: Passive Direct Attach Copper (DAC)
• Supported link speed: 25 Gb/s per SFP28 lane
• Latency: minimal, suitable for low-latency applications
• Form factor: factory-terminated, fixed breakout assembly

How to use

Install the cable by inserting the QSFP28 end into the host QSFP28 port and connecting each SFP28 end to the destination SFP28 ports. Ensure the host devices explicitly support QSFP28 to 4×SFP28 passive DAC breakout cables and that firmware or configuration permits breakout mode if required. Route the cable within the rack to avoid sharp bends and secure excess length to maintain airflow and reduce strain on the connectors.

Recommendations

Verify compatibility with your specific Palo Alto Networks device model and firmware before deployment. Use this passive DAC for short-range connections inside racks or between adjacent racks; for longer distances or different topologies consider active optical cables or transceivers with fiber.