The JBX05408 2.5m 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents the ideal connectivity solution for modern data center deployments requiring high-speed, low-latency interconnections. Purpose-built for Arista-compatible environments, this premium networking cable delivers consistent 40GB performance across rack-to-rack and switch-to-server configurations. **Technical Specifications & Construction** This passive DAC cable features professional-grade 30AWG twinax copper construction encased in durable plastic jacketing, providing excellent electromagnetic shielding and signal integrity. The dual QSFP+ connectors utilize gold-plated copper contacts to ensure reliable connections with zero signal degradation. At 2.5 meters in length, this cable is optimized for standard data center rack spacing while minimizing signal loss associated with longer cable runs. **Performance & Compatibility** Fully qualified to IEEE 802.3ba specifications and SFF-8436 standards, the JBX05408 guarantees seamless integration with Arista switches and compatible networking equipment. The passive design eliminates the need for active electronic components, reducing power consumption, heat generation, and potential points of failure—critical advantages in high-density environments. **Compliance & Safety** This cable meets stringent international safety and environmental standards including RoHS (Restriction of Hazardous Substances), EU directive 2002/95/EC, TUV, and UL certifications. These certifications ensure the product is safe for deployment in sensitive enterprise environments and compliant with global regulatory requirements. **Operational Excellence** With an operating temperature range of 0-70°C (32-158°F), the JBX05408 maintains optimal performance across diverse data center climates. The cable is backed by a 90-day limited warranty, and custom brand programming is available for organizations requiring white-label solutions. Ships from strategically located U.S. warehouses in Danville, CA and Beaufort, SC with free standard shipping on orders exceeding $99. **Applications** Ideal for: Data center switch interconnects, high-speed server clustering, storage array connections, and network infrastructure upgrades. Whether you're consolidating network equipment or scaling your data center capacity, this proven solution delivers enterprise reliability at an economical price point.