The JBX05294 5m 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents the ideal solution for organizations seeking reliable, cost-effective high-speed network connectivity. This meticulously engineered twinax cable bridges the gap between performance requirements and budget constraints, making it an excellent choice for data centers, enterprise networks, and telecommunications facilities implementing 40 Gigabit Ethernet infrastructure. Key Technical Specifications: This passive DAC operates at 40 Gbps per IEEE 802.3ba standards, utilizing 28AWG gauge twinax copper conductors with durable plastic jacketing. The 5-meter length accommodates typical rack-to-rack and switch-to-server distances without signal degradation. QSFP+ to QSFP+ connector configuration ensures compatibility with a comprehensive range of networking equipment, particularly Arista switches and transceivers. The cable maintains consistent performance across the 0-70°C operating temperature range, suitable for controlled data center environments. Compliance and Certification: Fully RoHS and ELV compliant, this cable meets EU Directive 2002/95/EC requirements. Multiple safety certifications including TUV and UL validation demonstrate our commitment to product quality and safety standards. IEEE 802.3ba and SFF-8436 qualification ensures interoperability with standards-based network equipment. Advantages of Passive DAC Technology: Unlike active DAC cables, this passive solution requires no power consumption, reducing energy costs and eliminating heat generation concerns. The simplicity of passive technology translates to exceptional reliability and longevity. For short-distance connections typical in data center environments, passive DAC performance matches active alternatives at a fraction of the cost. Applications and Use Cases: Ideal for connecting Arista switches to servers, storage systems, and other network equipment within immediate proximity. Perfect for building high-density switching architectures, aggregating multiple 40G connections, and upgrading existing infrastructure without extensive recabling. Customization and Support: Custom brand programming is available for organizations requiring private labeling. Backed by a 90-day limited warranty, quick shipment from multiple domestic locations (Danville, CA and Beaufort, SC) ensures minimal deployment delays. Free standard shipping applies to orders exceeding $99. The JBX05294 delivers OEM-equivalent performance while offering superior value, making it the smart choice for budget-conscious network engineers and IT decision-makers.