The JBX04995 400GBASE-CR8 QSFP-DD DAC breakout cable represents an essential component for modern high-speed data center networking. This 3-meter passive copper solution connects QSFP-DD interfaces to dual QSFP56 ports, enabling flexible network architecture expansion without introducing latency or signal degradation associated with active transceivers. Key Technical Specifications: This cable adheres to the ETC 400GBASE-CR8 standard and QSFP-DD MSA/CMIS specifications, ensuring universal compatibility with NVIDIA Mellanox switching and networking equipment. The 26AWG twinax copper construction maximizes signal fidelity while minimizing power consumption, making it ideal for power-constrained environments. At 3 meters, the cable length balances flexibility with performance, suitable for both compact rack deployments and distributed cabinet configurations. Compatibility & Performance: Direct replacement for OEM part numbers MCP7H60-W003R26 and 980-9IA3U-00W003, this breakout cable seamlessly integrates into existing infrastructure. The QSFP-DD form factor provides backward compatibility considerations while future-proofing network investments. Passive design eliminates electronic components, reducing heat generation and maintenance requirements. Compliance & Safety: Full RoHS/ELV compliance and TUV/UL certifications ensure regulatory adherence across international markets. The cable meets stringent environmental standards, supporting corporate sustainability initiatives. Operating temperature range of 0-70°C accommodates varied data center climate controls. Applications & Use Cases: Ideal for hyperscale data centers, enterprise network upgrades, and high-performance computing clusters requiring 400GB connectivity. Banks, cloud providers, and research institutions benefit from proven reliability. The breakout configuration enables cost-effective port expansion without full system replacement. Shipping & Support: Qualifying orders over $99 receive complimentary standard shipping from convenient US locations (Danville, CA and Beaufort, SC). Custom brand programming options available for OEM partnerships. The included 90-day limited warranty protects your investment while our technical support ensures seamless installation and integration.