The JBX05411 2.5-meter Cisco Compatible 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents a premium solution for high-speed data center and enterprise network connectivity. This passive DAC cable eliminates the complexity and cost associated with active optical or electrical components while maintaining exceptional signal integrity and reliability. Key Technical Specifications: Designed to IEEE 802.3ba standards and SFF-8436 specifications, this QSFP+ cable supports full 40GB data rates essential for modern data center infrastructure. The 30AWG twinax copper construction provides superior shielding and signal quality, while the compact form factor enables dense cable routing in crowded networking environments. Operating temperature range of 0-70°C (32-158°F) ensures reliable performance across diverse deployment scenarios. Compliance and Certification: Fully RoHS and ELV compliant per EU directive 2002/95/EC, with additional TUV and UL safety certifications. These certifications guarantee environmental responsibility and electrical safety, meeting stringent international standards for commercial and industrial networking applications. Compatibility and Applications: This cable serves as a direct replacement for Cisco QSFP-H40G-CU2-5M and MA-CBL-40G-250CM, making upgrades or replacements seamless. Perfect for QSFP+-equipped switches, routers, and network interface cards in data centers, enterprise networks, and high-performance computing environments. Advantages of Passive DAC Technology: Unlike active cables requiring external power, passive DAC cables offer lower latency, reduced power consumption, and simplified deployment. The 2.5-meter length provides flexibility for equipment spacing without signal degradation. Quality Assurance: Backed by a 90-day limited warranty and custom brand programming available for bulk orders. Ships from multiple U.S. locations with free standard shipping on orders exceeding $99. Manufactured in Vietnam and China to stringent quality controls, ensuring consistent performance and reliability across all units.