The JBX05852 1.5m 100GBASE-CR4 QSFP28 passive direct attach copper cable represents the optimal choice for enterprises seeking high-speed, cost-effective connectivity solutions. This purpose-built cable delivers 100GB/s performance with exceptional reliability, making it indispensable for modern data center infrastructure, high-performance computing clusters, and enterprise network backbone applications. **Key Features and Specifications:** Constructed with premium 30AWG twinax copper conductors and protective plastic jacketing, this passive DAC cable provides superior signal integrity without requiring external power sources. The dual QSFP28 connectors enable direct attachment between switches, servers, and storage systems, simplifying installation while reducing network latency. Measuring 1.5 meters in length, the cable offers versatile deployment options within standard rack configurations. **Performance and Compatibility:** Qualified to IEEE 802.3bj standards and QSFP28 MSA specifications, this cable ensures complete compatibility with HPE infrastructure. It directly replaces OEM part numbers 845404-B21-1-5M, R1N35A-1.5M, and 834973-B23, providing a reliable upgrade path for existing deployments. The cable's passive architecture eliminates cooling concerns and power consumption overhead associated with active solutions. **Reliability and Compliance:** Fully RoHS and ELV compliant per EU Directive 2002/95/EC, this cable meets rigorous safety certifications including TUV and UL standards. Operating reliably across temperatures from 0 to 70°C, it performs consistently in diverse data center environments. A 90-day limited warranty protects your investment, while free standard shipping on orders exceeding $99 reduces acquisition costs. **Applications:** Ideal for data center interconnects, switch-to-server connections, storage area networks, and high-performance computing environments. The 1.5m length facilitates connectivity within typical rack spacing while maintaining optimal signal quality for 100GB operations. Invest in proven 100GB connectivity with the JBX05852 QSFP28 DAC cable—engineered for performance, built for reliability.