CBO DAC cable QSFP to QSFP 0.5 m BlueLAN (direct-attach passive)

CBO DAC cable QSFP to QSFP 0.5 m BlueLAN (direct-attach passive) is a 0.5 metre direct attach copper (DAC) cable designed for short-range, high-speed connections between QSFP ports in switches, routers and servers. The passive construction provides a low-latency, power-efficient physical link that supports 40Gbps-class connectivity without the need for separate optical transceivers. This cable is intended for reliable rack-to-rack and in-rack patching in data centre environments and network closets where short, fixed-length connections are required.

Advantages

The direct-attach passive design delivers predictable signal performance and minimal latency while eliminating the cost and power consumption associated with separate transceivers. At 0.5 m length the cable offers a neat, low-profile connection that reduces cable clutter in dense rack deployments. Compatibility with standard QSFP ports ensures straightforward installation and hot-pluggable convenience. The copper construction provides thermal stability and consistent electrical characteristics for short-reach links.

Suitable for (tasks / use cases)

• Short-range 40Gbps connections between QSFP-enabled switches and routers
• In-rack patching between servers and top-of-rack switches
• Rack-to-rack links in data centre rows where short fixed-length cabling is preferred
• Temporary or permanent high-density cabling in network closets

Key specifications

• Connector type: QSFP to QSFP
• Cable type: Direct-attach passive copper
• Length: 0.5 metre
• Nominal data rate: 40 Gbps class
• Designed use: Short-reach interconnects (in-rack, rack-to-rack)
• Colour: Blue

How to use

Install the cable by inserting each QSFP connector into the corresponding QSFP port until it engages; ensure both devices support passive DAC connections and are powered off or that hot-plugging is supported by your equipment. Route the cable to avoid sharp bends and mechanical strain; the short 0.5 m length simplifies tidy routing within racks. After connection, verify link status in the network equipment management interface and confirm expected throughput and error rates. For removal, depress the latch on each QSFP connector and withdraw gently.

Recommendations

Use this cable for short-distance, high-density deployments where 40Gbps QSFP connectivity is required and optical transceivers are not needed. Avoid using the cable in environments requiring extended reach or in situations with excessive vibration or physical stress. For best results, pair with compatible QSFP ports and monitor link performance after installation.