The JBX05297 Cisco Compatible 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable is an essential connectivity solution for modern data center and enterprise networking environments. Engineered to deliver exceptional performance, this 5-meter cable provides a cost-effective alternative to active solutions while maintaining industry-leading reliability standards. **Key Technical Features:** With 28AWG twinax copper construction, the cable minimizes signal degradation and electromagnetic interference, ensuring clean, stable data transmission at full 40GB/s speeds. The QSFP+ to QSFP+ connector configuration maintains universal compatibility with leading network equipment manufacturers, particularly Cisco systems. IEEE 802.3ba qualification guarantees standards-compliant performance with comprehensive testing and validation. **Design & Construction:** The passive direct attach architecture eliminates active signal amplification, resulting in lower power consumption, reduced operational costs, and minimal latency introduction. The protective plastic jacketing provides durability during installation and daily use while maintaining flexibility for cable management in dense rack environments. **Compliance & Safety:** RoHS and ELV directive compliance ensures environmental responsibility and safe handling. TUV and UL certifications validate electrical safety and performance standards. These certifications make the cable suitable for regulated enterprise and mission-critical applications. **Compatibility & Replacement:** Direct replacement for OEM part numbers QSFP-H40G-CU5M and MA-CBL-40G-5M, providing seamless integration with existing Cisco infrastructure. Ideal for connecting switches, routers, line cards, and transceivers without requiring dedicated power supplies. **Operating Specifications:** Rated for 0-70°C operating temperature range, supporting both standard and warm data center environments. The 5-meter length bridges typical rack-to-rack or equipment-to-distribution distances common in enterprise deployments. **Ideal Applications:** Perfect for data center interconnection, high-speed backup systems, virtualized server environments, and any scenario requiring reliable 40GB Ethernet connectivity. Backed by a 90-day limited warranty. Ships from multiple U.S. locations with free standard shipping on orders over $99.