The JBX05823 0.5m 100GBASE-CR4 QSFP28 Passive Direct Attach Copper Cable represents an excellent solution for organizations seeking cost-effective, high-speed networking connectivity. Designed specifically for HPE compatibility, this cable delivers exceptional performance in demanding data center environments where bandwidth and reliability are critical. Key Technical Specifications: This passive DAC cable operates at 100GB data rates using 100GBASE-CR4 technology, qualifying it for the most demanding modern networking applications. The 30AWG twinax copper construction provides optimal signal integrity over short distances while maintaining flexibility for installation in tight spaces. Operating temperatures range from 0 to 70°C, accommodating diverse data center conditions. The cable's compact 12x12x2mm dimensions and 0.5-meter length make it ideal for direct server-to-switch or switch-to-switch connections without the bulk of traditional cabling solutions. Compliance and Certification: Fully compliant with IEEE 802.3bj standards and QSFP28 MSA specifications, this cable meets international safety requirements including RoHS, TUV, and UL certifications. The RoHS compliance ensures environmentally responsible operation aligned with EU Directive 2002/95/EC. Advantages Over Active Cables: Unlike active DAC cables, this passive solution requires no external power, reducing complexity and operational costs. It eliminates potential points of failure associated with powered components while delivering equivalent performance for short-reach applications. OEM Compatibility: Direct replacement for HPE part numbers 834973-B21, R1N34A, and 845402-B21, ensuring seamless integration into existing HPE infrastructure without compatibility concerns. Shipping and Support: Shipped from strategically located US distribution centers in Danville, CA and Beaufort, SC, orders qualify for free standard shipping on purchases over $99. The 90-day limited warranty provides peace of mind for your investment in reliable network infrastructure.