The JBX05330 0.5m 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents the ideal solution for high-bandwidth networking requirements in modern data centers and enterprise environments. Built to Extreme Networks specifications, this cable delivers consistent 40Gbps performance with the reliability professionals demand. **Key Features & Benefits:** This passive DAC cable operates without active electronics, eliminating power consumption concerns and reducing heat generation in crowded server racks. The 30AWG twinax copper construction provides optimal signal integrity over short distances, making it perfect for switch-to-server and server-to-storage connections. At just 0.5 meters, it's ideal for high-density environments where compact cabling solutions are essential. **Technical Excellence:** Qualified to IEEE 802.3ba and SFF-8436 specifications, the JBX05330 ensures compatibility with Extreme Networks equipment including switches, NICs, and storage systems. Full RoHS and TUV certification guarantees environmental compliance and safety standards adherence. Operating temperature range of 0-70°C accommodates diverse data center conditions. **Superior Build Quality:** Durable plastic jacketing protects copper conductors from environmental stress, while QSFP+ connectors feature gold-plated contacts for reliable connections. The cable dimensions (12x12x2) provide excellent manageability without sacrificing durability. **Cost-Effective Solution:** Compared to active cables or fiber alternatives, this passive DAC significantly reduces total cost of ownership while maintaining performance. No driver software, licensing fees, or compatibility issues—just plug-and-play connectivity. **Wide Compatibility:** Replaces multiple OEM part numbers (40G-DACP-QSFPZ5M, 10311, 40GB-C0.5-QSFP, AA1404037-E6), simplifying procurement and inventory management. Custom brand programming available for organizations requiring proprietary labeling. **Warranty & Support:** Backed by a 90-day limited warranty and shipped from convenient US locations (Danville, CA and Beaufort, SC) with free standard shipping on orders over $99. Ideal for IT managers, network engineers, and data center professionals seeking reliable, standards-compliant connectivity solutions.