The JBX05078 3-meter 400GBASE-CR8 QSFP-DD to 8x SFP56 direct attach copper cable represents cutting-edge networking infrastructure designed for next-generation data centers and high-performance computing environments. This passive breakout DAC cable enables seamless connectivity between NVIDIA Mellanox switches and multiple downstream network devices, supporting simultaneous 400Gbps data transmission across eight independent SFP56 channels. **Technical Specifications & Performance:** This cable meets and exceeds ETC 400GBASE-CR8 and CMIS specifications, delivering consistent 400Gbps performance with minimal signal degradation. The 28AWG twinax copper construction provides optimal electrical characteristics for low-latency, high-fidelity signal transmission. Operating across 0-70°C (32-158°F), the cable maintains performance stability in diverse deployment scenarios, from air-conditioned data centers to edge computing facilities. **Compliance & Certifications:** Fully RoHS and ELV compliant per EU Directive 2002/95/EC, this cable meets stringent environmental and safety standards. TUV and UL certifications validate electromagnetic compatibility and electrical safety. These certifications ensure compliance with global procurement standards and environmental regulations. **Compatibility & Integration:** As a direct replacement for NVIDIA Mellanox MCP7F80-W003R26, this cable integrates seamlessly into existing infrastructure without modifications. The QSFP-DD form factor with copper connectors ensures reliable, reversible connections with industry-standard locking mechanisms. **Application Benefits:** - Data center interconnects and core switching - HPC cluster fabric networks - Enterprise switching infrastructure - Cloud service provider deployments - Cost-effective alternative to active cables **Advantages Over Alternatives:** Passive DAC technology eliminates power consumption associated with active cables, reducing operational costs. The passive design removes potential failure points, increasing system reliability. Copper construction provides superior electromagnetic shielding compared to fiber alternatives, ideal for short-range, high-density deployments. **Warranty & Support:** Backed by a 90-day limited warranty and backed by expert technical support. Custom brand programming available for enterprise customers requiring white-label solutions. Manufactured in Vietnam and China with shipments from Danville, CA and Beaufort, SC, ensuring rapid delivery and responsive customer service. Free standard shipping on orders exceeding $99 reduces total acquisition costs.