The JBX05644 2.5m HPE Q9S72A-2-5M Compatible 100GBASE-CR4 QSFP28 to 4x SFP28 Direct Attach Copper Cable represents an essential networking component for modern data center infrastructures. This passive breakout DAC cable combines reliability, performance, and cost-efficiency for organizations requiring high-speed, short-reach connectivity. **Product Overview** Designed as a direct replacement for HPE's OEM part number Q9S72A-2-5M and 845416-B21-2-5M, this cable delivers authentic 100GB performance without compatibility concerns. The 2.5-meter length accommodates typical rack-to-rack distances while maintaining signal quality and minimizing latency. **Technical Specifications** The cable features premium 30AWG twinax copper construction with durable plastic jacketing, ensuring longevity in demanding environments. Its QSFP28 connector terminates to four individual SFP28 connectors, enabling flexible port distribution and equipment consolidation. Operating within 0-70°C temperature ranges, this cable performs reliably across standard data center conditions. **Compliance & Certification** Fully RoHS/ELV compliant and certified to IEEE 802.3bj specifications, this cable meets stringent international standards. TUV and UL safety certifications provide additional assurance for enterprise deployments. **Applications** Ideal for: • High-speed server interconnects • Switch-to-switch backbone connections • Storage area network (SAN) links • HPC cluster communications • Cloud infrastructure upgrades **Key Advantages** Passive design eliminates power consumption and associated heat generation. Direct HPE compatibility ensures seamless integration with existing infrastructure. The 90-day limited warranty provides peace of mind for critical network investments. **Shipping & Support** Free standard shipping on orders exceeding $99, with convenient shipment options from Danville, CA and Beaufort, SC distribution centers. Custom brand programming is available for enterprise customers requiring specialized configurations.