The JBX05123 0.5m Cisco-compatible 400GBASE-CR8 QSFP-DD direct attach copper cable represents the optimal connectivity solution for next-generation data center infrastructure. This passive DAC cable is specifically designed to meet the demanding requirements of 400GB high-speed networking applications while maintaining exceptional signal integrity and reliability. Key Features: Form Factor & Connectors: QSFP-DD to QSFP-DD connectors ensure seamless integration with compatible network equipment. The compact 0.5m length (approximately 20 inches) is ideal for short-reach, high-density switch interconnections and top-of-rack configurations. Technical Specifications: • Data Rate: 400GB per second • Conductor: 30AWG twinax copper with plastic jacketing • Operating Temperature: 0°C to 70°C (32°F to 158°F) • IEEE Compliance: Qualified to ETC 400GBASE-CR8 and QSFP-DD MSA specifications • Standards: CMIS compliant Performance Advantages: As a passive cable solution, the JBX05123 offers zero-latency transmission with no external power requirements, reducing energy consumption and simplifying deployment. The direct attach design eliminates transceiver-to-transceiver latency, making it perfect for latency-sensitive applications such as financial trading platforms, AI/ML clusters, and cloud infrastructure. Compliance & Certifications: Fully compliant with RoHS Directive 2002/95/EC and ELV regulations. Third-party certified by TUV and UL standards, ensuring safety and quality assurance. Built to OEM QDD-400-CU0.5M specifications for guaranteed compatibility with Cisco equipment. Shipping & Support: Shipped from convenient U.S. locations in Danville, CA and Beaufort, SC, with free standard shipping on orders exceeding $99. Supported by a comprehensive 90-day limited warranty. Custom brand programming available for enterprise deployments. The JBX05123 is the cost-effective, reliable choice for network architects and IT professionals seeking enterprise-grade 400GBASE-CR8 connectivity without premium pricing.