The JBX05840 100GBASE-CR4 QSFP28 passive DAC cable represents a cost-effective, high-performance connectivity solution for modern data center and enterprise networking environments. Specifically designed for Ruckus-compatible switches and networking equipment, this 0.5-meter cable enables seamless integration into existing infrastructure while maintaining exceptional performance standards. **Key Features & Benefits:** This passive direct attach copper cable eliminates the need for active electronics, resulting in lower power consumption, reduced heat generation, and minimal latency. The 30AWG twinax copper construction provides excellent signal quality and impedance matching, ensuring reliable data transmission at 100Gbps speeds. QSFP28 connectors on both ends guarantee compatibility with standard networking equipment. **Technical Excellence:** Qualified to IEEE 802.3bj specifications and QSFP28 MSA standards, this cable meets stringent industry requirements. The 0.5-meter length is ideal for intra-rack and adjacent-rack connections in high-density server environments. Operating temperature range of 0-70°C accommodates diverse deployment scenarios. **Compliance & Quality:** RoHS and TUV certified, this cable adheres to EU directive 2002/95/EC environmental standards. Manufactured in Vietnam and China with rigorous quality control, it delivers consistent performance. The 90-day limited warranty provides peace of mind for enterprise deployments. **Applications:** Ideal for data center interconnects, storage arrays, high-performance computing clusters, and any environment requiring 100Gbps passive connectivity. Perfect for organizations seeking to reduce operational costs while maintaining network performance and reliability. **Value Proposition:** Compared to active cables, passive DAC solutions offer superior economics without sacrificing performance. At 0.5 meters, this cable bridges short distances efficiently, making it an essential component for modern infrastructure optimization.