CBO DAC cable QSFP-40G-C50CM 50 cm passive QSFP+ to QSFP+

BlueOptics CBO DAC cable QSFP-40G-C50CM is a 50 cm passive QSFP+ to QSFP+ twinax cable engineered for 40 Gbps short-range connections in data centers. The cable integrates QSFP+ connectors on both ends to deliver a direct attach copper link without the need for optical transceivers, making it suitable for low-latency server, switch and storage interconnects across top-of-rack and intra-rack deployments.

Advantages

The passive design provides energy-efficient connectivity with minimal additional components, reducing power consumption compared to transceiver-based links. Its short 50 cm length limits signal attenuation for reliable 40 Gbps performance while keeping latency low. The integrated QSFP+ connectors simplify installation and maintenance, and the twinax construction offers predictable electrical characteristics for consistent channel performance in dense rack environments.

Suitable for

• Top-of-rack switch to server 40 Gbps connections
• Intra-rack links between switches and storage arrays
• Short-range, high-throughput interconnects in data centers
• Environments prioritizing low latency and energy efficiency

Key specifications

• Connector type: QSFP+ to QSFP+
• Nominal data rate: 40 Gbps aggregate
• Cable type: Passive twinax copper
• Length: 50 cm
• Typical use: Short-range server, switch, storage interconnects
• Latency: negligible for direct-attach copper links

How to use

Insert each QSFP+ connector into the corresponding QSFP+ port on your network device until the latch engages. Ensure ports are powered down or follow hot-plug guidance from device vendors if inserting into live ports. Confirm link negotiation and 40 Gbps operation via the device management interface or LED indicators. For removal, depress the connector latch and pull straight out to avoid stressing the cable or port.

Recommendations

Install the cable in rack paths with minimal bends; maintain the manufacturer’s recommended bend radius to preserve signal integrity. Use this passive 50 cm DAC for short-distance links within the same rack or adjacent racks; for longer runs consider active DACs or fiber-based solutions. Verify compatibility with device port specifications and check link status after installation.