DAC Cable BlueOptics QSFP-200G-C3M-BL 3m QSFP56 Black

The BlueOptics QSFP-200G-C3M-BL 3m QSFP56 Black is a direct attach copper (DAC) cable designed for short-reach, high-bandwidth interconnects. With QSFP56 connectors at both ends and a 3 metre length, this cable supports 200 Gigabit Ethernet links commonly used in modern data centre and high-performance computing environments. It is built to provide low-latency, reliable connectivity between switches, routers, network interface cards and aggregation devices where optical transceivers are not required.

Advantages

This DAC cable offers a compact, energy-efficient solution for 200 Gbit/s links over short distances. Its QSFP56 male connectors enable straightforward plug-and-play installation, while the fixed copper assembly eliminates the need for separate transceivers and fibre patching. The black outer jacket and durable construction provide mechanical protection and easy identification in rack cabling setups. Overall, the cable reduces power consumption and ongoing maintenance compared with active optical solutions for similar link speeds.

Suitable for

• Short-distance interconnects between switches and routers in data centres
• Direct server-to-switch connections in top-of-rack deployments
• High-performance computing clusters requiring low-latency links
• Aggregation links in network racks where 200 Gbit/s capacity is needed

Key specifications

• Cable type: Direct attach copper (DAC)
• Connector type: QSFP56 male to QSFP56 male
• Nominal data rate: 200 Gbit/s
• Length: 3 m
• Colour: Black
• Typical application: Short-reach Ethernet and InfiniBand interconnects
• Weight: approximately 0.15 kg

How to use

Ensure both devices support QSFP56 direct-attach copper connections and 200 Gigabit Ethernet operation before installation. Power down or follow hot-swap guidelines of your equipment if required by the vendor. Align each QSFP56 connector with the device port and insert until the retention mechanism engages. Verify link status via device LEDs or management interfaces and confirm negotiated speeds and lane configuration. For removal, release the connector latch and withdraw the cable gently to avoid damaging the port.

Recommendations

Use this 3 m DAC cable for short, rack-level connections where low latency and power efficiency are priorities. Avoid routing the cable near high-heat sources or sharp edges, and maintain bend radii recommended by the equipment manufacturer to preserve signal integrity. For longer runs, consider optical transceivers and fibre solutions instead of direct-attach copper.