The JBX05311 5-meter 40GBASE-CR4 QSFP+ passive direct attach copper cable represents a cost-effective, high-performance solution for modern data center networking requirements. As a passive DAC (Direct Attach Copper) cable, it eliminates the complexity and expense of active transceivers while delivering proven reliability in enterprise environments. **Key Features:** This Intel-compatible cable utilizes QSFP+ connectors on both ends, providing a secure, hot-pluggable connection interface. The 28AWG twinax construction offers superior signal quality and reduced crosstalk, essential for maintaining 40Gbps performance over the 5-meter distance. The passive design requires no power supply or additional management, simplifying installation and reducing operational costs. **Performance & Standards:** Qualified to IEEE 802.3ba specifications, the JBX05311 ensures compatibility with enterprise-grade equipment. The cable delivers consistent 40GB data rates while maintaining low insertion loss and return loss characteristics that meet industry standards for high-speed copper connectivity. **Compliance & Durability:** Full RoHS and EU directive compliance ensures the cable meets stringent environmental standards. TUV and UL safety certifications guarantee reliable performance under specified conditions. The operating temperature range of 0-70°C (32-158°F) accommodates diverse deployment environments from air-conditioned data centers to equipment rooms with variable climate control. **Applications:** Ideal for hyperscale data centers, cloud computing infrastructure, high-performance computing clusters, and enterprise network upgrades. The 5-meter length provides flexibility for medium-distance interconnects between adjacent racks or equipment. **Compatibility:** Direct replacement for Intel OEM part numbers CBL1-0600526 and XLDACBL5. Custom brand programming available for organizations requiring private-label solutions. **Value Proposition:** Combining passive technology cost-effectiveness with enterprise-grade reliability, the JBX05311 delivers superior total cost of ownership compared to active transceiver alternatives. Free standard shipping on orders over $99 and a 90-day limited warranty provide additional customer assurance.