DAC Cable BlueOptics 40G-DACP-QSFP3M-BL QSFP 40G 3m Black

The BlueOptics 40G-DACP-QSFP3M-BL is a direct-attach copper (DAC) cable designed for high-speed 40 Gigabit connections. With QSFP connectors on both ends and a 3 m length, this cable supports short-reach, low-latency links commonly used in data centers and high-performance networking equipment. The build emphasizes electrical performance, mechanical flexibility and a black jacket for standard rack installations.

Advantages

This DAC cable delivers native 40G throughput without the need for transceivers, reducing power consumption and port cost. Its QSFP-to-QSFP termination provides easy plug-and-play installation and reliable mating with compatible switches, servers and adapters. Constructed for durability, the cable maintains signal integrity across its 3 m length while remaining flexible enough for typical cable management in rack environments.

Suitable for

• High-speed interconnects between switches and servers in data centers
• Short-reach links for storage area networks and cluster computing
• Direct connections between QSFP-enabled network adapters and switches

Key specifications

• Nominal data rate: 40 Gbit/s
• Cable type: Direct-Attach Copper (DAC)
• Connector type: QSFP to QSFP
• Length: 3 m
• Colour: Black
• Weight: 0.25 kg

How to use

Ensure both endpoints support QSFP 40G DAC connections and that the equipment is powered down or follows hot-plug guidance from the vendor. Align the QSFP connector latch and insert the cable firmly into the QSFP port until it seats. Verify link lights or management interfaces on each device to confirm an active 40G connection. Route the cable to avoid sharp bends and excessive stress on the connectors.

Recommendations

Use the cable for short-reach links within racks or between adjacent racks. Avoid repeated flexing at the connector interface, maintain bend radius recommended by the equipment vendor, and store spare cables flat or on appropriate reels to preserve performance.