The JBX05297 5-meter Cisco Compatible 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents a premium networking solution for modern data centers and high-performance computing environments. This cable is specifically engineered to support the demanding requirements of 40 Gigabit Ethernet connectivity with exceptional reliability and performance. **Technical Specifications and Performance:** This passive direct attach copper (DAC) cable utilizes 28AWG twinax copper conductors encased in protective plastic jacketing, delivering 40GB data transmission rates compliant with IEEE 802.3ba standards. The QSFP+ to QSFP+ connector configuration ensures seamless compatibility with Cisco networking equipment, including switches, routers, and server adapters. The 5-meter length provides optimal flexibility for medium-distance interconnections within data center environments while maintaining signal integrity. **Key Advantages:** Unlike active optical cables (AOCs), this passive DAC design requires no external power, reducing operational costs and eliminating potential points of failure. The passive technology generates minimal heat, making it ideal for densely populated switch ports where thermal management is critical. The robust copper construction ensures excellent EMI shielding and signal stability, crucial for maintaining high-speed data transfer reliability. **Certification and Compliance:** Fully compliant with RoHS (EU Directive 2002/95/EC) and ELV standards, this cable meets stringent environmental and safety requirements. TUV and UL certifications validate the cable's quality and safety performance. Qualified to IEEE 802.3ba specifications, it delivers industry-standard performance metrics for 40GBASE-CR4 applications. **Compatibility and Integration:** This cable directly replaces Cisco OEM part numbers QSFP-H40G-CU5M and MA-CBL-40G-5M, simplifying procurement and inventory management. Compatible with Cisco Nexus switches, UCS fabric interconnects, and third-party equipment supporting QSFP+ interfaces, it provides flexibility across heterogeneous networking environments. **Operating Conditions:** Rated for operating temperatures between 0-70°C (32-158°F), this cable performs reliably across diverse deployment scenarios, from climate-controlled data centers to challenging field installations. The durable plastic jacketing provides mechanical protection while maintaining flexibility for cable routing and management. **Warranty and Support:** Backed by a comprehensive 90-day limited warranty, this product reflects our commitment to quality. Custom brand programming is available for enterprise customers requiring specific branding requirements. Free standard shipping on orders exceeding $99 provides excellent value, with convenient shipping locations in Danville, CA and Beaufort, SC ensuring rapid delivery. Choose the JBX05297 for reliable, cost-effective 40GB connectivity that meets enterprise networking standards.