The JBX04999 400GBASE-CR8 QSFP-DD to 2x QSFP56 direct attach copper cable is a mission-critical connectivity solution designed for enterprise and hyperscale data centers demanding maximum performance and reliability. This 0.5-meter passive breakout DAC cable enables seamless integration with NVIDIA Mellanox networking infrastructure, supporting full 400Gbps throughput with zero signal degradation. **Technical Excellence** Manufactured with precision-engineered 30AWG twinax copper conductors and high-quality plastic jacketing, this cable meets the demanding requirements of 400GBASE-CR8 specifications. The cable qualifies to ETC 400GBASE-CR8 and QSFP-DD MSA standards, ensuring compatibility across generations of networking equipment. Operating temperature range of 0-70°C (32-158°F) accommodates diverse deployment scenarios, from climate-controlled data centers to edge environments. **Compliance and Certification** Full RoHS and TUV certifications ensure environmental compliance and safety standards adherence. The cable meets EU directive 2002/95/EC (RoHS) requirements, making it suitable for global deployments. These certifications provide confidence in product quality and longevity. **Optimal Connectivity Solution** The passive design eliminates power requirements and associated heat generation, reducing operational complexity and cooling demands. At 0.5m, the cable length provides optimal flexibility for high-density rack configurations while minimizing signal loss. Perfect for breakout architectures where single 400G connections need distribution to multiple 200G or lower-speed interfaces. **Broad Compatibility** Direct compatibility with NVIDIA Mellanox MCP7H60-W00AR30 OEM specifications ensures drop-in functionality. This cable integrates seamlessly with Mellanox switch platforms, HCA cards, and networking equipment used in cloud computing, financial services, scientific research, and high-performance computing applications. **Deployment Benefits** The passive architecture reduces total cost of ownership compared to active optical alternatives while delivering identical performance for short-reach applications. Includes 90-day limited warranty and qualifies for free standard shipping on orders over $99. Custom brand programming available for enterprise customers requiring asset identification and inventory tracking capabilities. Whether upgrading existing infrastructure or deploying new 400G networks, the JBX04999 delivers enterprise-grade reliability at competitive pricing.