The JBX05323 0.5m 40GBASE-CR4 QSFP+ passive direct attach copper cable represents an excellent choice for organizations requiring high-speed, cost-effective datacenter interconnectivity. This premium-quality DAC cable utilizes advanced 30AWG twinax copper construction to deliver exceptional performance in 40GB ethernet applications while maintaining superior signal fidelity and low latency characteristics essential for modern data center operations. **Key Features & Specifications:** This passive DAC cable supports full 40GBASE-CR4 transmission speeds, enabling seamless integration with Brocade networking equipment and other compatible infrastructure. The compact 0.5-meter length provides optimal flexibility for equipment racks, server-to-switch connections, and storage array deployments without introducing unnecessary bulk or management complications. Constructed with industry-standard QSFP+ connectors on both ends, it offers universal compatibility with existing network equipment. **Performance & Reliability:** Qualified to IEEE 802.3ba specifications, this cable undergoes rigorous testing to ensure reliable operation in demanding datacenter environments. The passive design eliminates power requirements, reducing complexity and heat generation compared to active optical cables. Operating temperature range of 0-70°C ensures reliable performance across diverse environmental conditions. **Compliance & Certifications:** Fully RoHS and TUV certified, this cable meets EU directive 2002/95/EC requirements and includes UL safety certifications. These comprehensive certifications confirm environmental responsibility and electrical safety for enterprise deployments. **Value Proposition:** As a direct replacement for Brocade OEM part number 40G-QSFP-C-00501, this cable delivers identical functionality at competitive pricing. The 90-day limited warranty provides additional peace of mind. Custom brand programming is available for organizations requiring customized branding solutions. **Shipping & Support:** Ships from strategically located US distribution centers in California and South Carolina, ensuring rapid delivery. Free standard shipping applies to orders exceeding $99, reducing total cost of ownership for enterprise purchases.