The JBX05322 0.5m 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents an exceptional solution for organizations seeking reliable, cost-effective high-speed network connectivity. This meticulously engineered cable delivers enterprise-grade performance while maintaining the simplicity and affordability of passive technology. **Technical Specifications & Performance** Designed to IEEE 802.3ba and SFF-8436 standards, this cable supports full 40GB Ethernet transmission rates with exceptional signal fidelity. The 30AWG twinax copper construction provides optimal impedance characteristics for maintaining data integrity over short-haul distances. Operating temperatures from 0-70°C ensure consistent performance in diverse data center environments, from cool-aisle installations to standard server room conditions. **Superior Design & Construction** The passive DAC architecture eliminates the need for power consumption or active signal regeneration, reducing operational costs and heat output in crowded server racks. Copper connectors and twinax shielding minimize signal loss and electromagnetic interference, critical for maintaining 40GB throughput reliability. The plastic jacket provides durable protection against physical damage and environmental contaminants. **Seamless Compatibility & Integration** Fully compatible with Arista switching infrastructure, this cable serves as a direct replacement for part number CAB-Q-Q-0.5M. QSFP+ form factor connectors ensure compatibility with modern high-density network equipment. The compact 0.5m length optimizes airflow in equipment stacks while maintaining sufficient slack for cable management. **Compliance & Certifications** RoHS/ELV certified and TUV/UL validated, ensuring compliance with stringent environmental and safety requirements. Manufacturing sourced from Vietnam and China guarantees quality consistency and supply chain reliability. **Ideal Applications** Perfect for data center core switch interconnections, high-performance computing clusters, storage area networks (SANs), and enterprise backbone upgrades. Particularly valuable in cost-sensitive deployments where passive technology proves adequate for short-distance, high-bandwidth requirements. **Value Assurance** Backed by a 90-day limited warranty and supported by multiple U.S. shipping locations (Danville, CA and Beaufort, SC), with complimentary standard shipping on qualifying orders. Custom brand programming available for OEM and enterprise deployments.