Network Cable BlueLAN QSFP-40G-3M-CM QSFP 40GBASE-CR4 3 Meter Blue

The BlueLAN QSFP-40G-3M-CM is a 3 meter direct attach cable engineered for 40GBASE-CR4 applications. Constructed with 30AWG conductors and a QSFP form factor, this network cable supports 40 Gigabit Ethernet and Infiniband QDR interconnects. Its blue jacket aids visual identification in dense cabling environments while the twin-ax copper design provides low latency and predictable signal characteristics for short-reach data center links.

Advantages

This QSFP 40GBASE-CR4 cable offers a ready-to-deploy low-power alternative to optical modules for short links, with native compatibility for 40 Gigabit Ethernet and Infiniband QDR systems. The 30AWG construction balances flexibility and electrical performance to reduce insertion loss across the 3 meter length. The fixed-length direct attach design eliminates the need for separate transceivers and simplifies inventory management in rack and switch deployments.

Suitable for

• Short-reach 40GbE connections between switches and blade servers
• High-density data center top-of-rack and end-of-row cabling
• Infiniband QDR interconnects in HPC and storage clusters
• Environments where color-coded cable management improves maintenance

Key specifications

• Length: 3 meters
• Connector type: QSFP (QSFP+ compatible form factor)
• Application: 40GBASE-CR4 (40 Gigabit Ethernet), Infiniband QDR
• Conductor gauge: 30AWG twin-ax copper
• Transmission medium: Passive copper direct attach cable
• Cable color: Blue
• Typical use range: Short-reach interconnects within racks or between adjacent racks

How to use

Connect one QSFP connector to the QSFP port on the first device and the other end to the corresponding QSFP port on the second device. Ensure both devices support 40GBASE-CR4 or compatible Infiniband QDR operation before powering on the link. Route the cable to avoid sharp bends and maintain the manufacturer’s minimum bend radius; secure the cable with cable management hardware to prevent strain on the connectors. No transceivers or additional modules are required for operation, simplifying installation.

Usage recommendations

Use this direct attach cable for intra-rack or adjacent-rack 40GbE and QDR links where distances do not exceed the cable’s intended short-reach range. Verify switch and host compatibility with QSFP passive copper assemblies and follow standard ESD and handling procedures when installing. For longer distances or where optical isolation is required, consider optical transceiver solutions instead.