DAC Cable BlueOptics FN-CABLE-QSFP28-3-BL QSFP28 QSFP28 InfiniBand 3 m Black

The BlueOptics FN-CABLE-QSFP28-3-BL is a 3-meter direct attach copper (DAC) cable with QSFP28 connectors on both ends. Designed for high-speed data transmission, this QSFP28 DAC cable supports InfiniBand and compatible 100GbE equipment where QSFP28 ports are used. The black outer jacket and compact form factor suit data center racks and short-reach interconnects between switches, servers and storage appliances while keeping signal integrity and low latency.

Advantages

This 3 m DAC cable provides a cost-effective, low-latency connection with integrated QSFP28 connectors, reducing the need for separate transceivers. The assembly is lightweight and delivers stable electrical performance for short-range links in dense networking environments. Its QSFP28 terminations ensure straightforward plug-and-play installation in compatible InfiniBand and Ethernet QSFP28 ports while the black jacket offers a neutral appearance for professional installations.

Suitable for

• Interconnects between switches and servers within racks (short-reach)
• High-performance computing clusters using InfiniBand
• Connections between storage arrays and host adapters with QSFP28 ports
• Data center top-of-rack and end-of-row cabling where 3 m reach is sufficient

Key specifications

• Cable type: Direct attach copper (DAC)
• Cable length: 3 m
• Connector type (both ends): QSFP28
• Typical use: Short-reach, high-speed interconnects (InfiniBand / 100GbE compatible)
• Product colour: Black
• Weight: 0.15 kg

How to use

Ensure both endpoints have compatible QSFP28 ports and that devices are powered down or support hot-plugging per vendor guidance. Insert each QSFP28 connector into the corresponding port until it seats firmly and the latch (if present) engages. Verify the link status on connected devices and configure port settings as required by your network or storage equipment. For best signal performance, avoid tight bends and keep the cable clear of sources of electromagnetic interference.

Recommendations

Use this QSFP28 DAC cable for direct short-distance connections inside racks and between adjacent racks. Confirm firmware and port compatibility on switches, NICs and HBAs for InfiniBand or 100GbE operation. Store the cable coiled loosely and avoid sharp bends to preserve cable integrity and performance.