The JBX05491 3-meter 40GBASE-CR4 QSFP+ passive direct attach copper cable represents an essential connectivity solution for modern enterprise data center environments. Engineered specifically for Palo Alto Networks compatibility, this premium networking cable delivers the performance and reliability demanded by mission-critical infrastructure. **Superior Design & Construction** Built with 30AWG twinax copper conductors, this passive DAC cable provides exceptional signal integrity and minimal signal loss over its 3-meter span. The copper construction combined with advanced twinax design ensures optimal performance for 40GB Ethernet transmission, meeting all IEEE 802.3ba specifications. The robust plastic jacketing protects the internal copper elements from environmental factors while maintaining flexibility for installation in tight rack spaces. **Technical Excellence** As a passive direct attach copper solution, this cable requires no external power, reducing energy consumption and simplifying deployment compared to active optical alternatives. The QSFP+ connectors provide industry-standard connectivity to compatible network switches, routers, and servers. With a 3-meter length, it's ideally suited for intra-rack and adjacent-rack connections within data center environments. **Compliance & Certification** Fully compliant with RoHS/ELV directives and certified by TUV and UL, this cable meets rigorous international safety and environmental standards. It qualifies under EU directive 2002/95/EC and carries the harmonization code 8544.42.9090, ensuring legitimate sourcing and regulatory adherence. **Real-World Applications** Ideally suited for: • High-speed server-to-switch connectivity • Storage area network (SAN) implementations • Virtual machine infrastructure expansion • Data center equipment upgrades • Palo Alto Networks security appliance deployments **Operational Specifications** Operates reliably across temperatures from 0°C to 70°C (32°F to 158°F), accommodating both climate-controlled data centers and equipment with moderate thermal variation. The 90-day limited warranty provides peace of mind for your infrastructure investment. **Value Proposition** As a direct replacement for OEM part number PAN-QSFP-CU-3M, this cable offers significant cost savings compared to original manufacturer pricing while maintaining full compatibility and performance standards. Ships from multiple U.S. locations (Danville, CA and Beaufort, SC) with free standard shipping on qualifying orders, ensuring rapid deployment without excess logistics costs.