The JBX05043 3-meter 400GBASE-CR8 QSFP-DD to 4x QSFP56 Direct Attach Copper cable represents the ideal solution for high-performance data center interconnects requiring maximum port density and reliability. Purpose-built for NVIDIA Mellanox infrastructure, this passive breakout cable delivers exceptional value without compromising performance. **Key Features & Specifications:** This professional-grade DAC cable features a QSFP-DD male connector on one end and four QSFP56 male connectors on the opposite end, enabling a single 400GB port to split into four 100GB connections. The 28AWG twinax copper construction ensures optimal signal integrity while maintaining flexibility for installation in tight rack spaces. **Performance & Compatibility:** Qualified to ETC 400GBASE-CR8 specifications and QSFP-DD MSA standards, this cable provides direct compatibility with NVIDIA Mellanox switching and networking equipment. The passive breakout design operates without additional power requirements, reducing operational costs and cooling demands in data center environments. Supports sustained data transmission at full 400GB line rates across the complete 3-meter span. **Quality & Compliance:** Manufactured to the highest standards with RoHS and ELV compliance, this cable meets UL and TUV safety certifications. The robust plastic jacket protects copper twinax pairs while maintaining installation flexibility. Operating temperature range of 0-70°C (32-158°F) accommodates diverse deployment scenarios. **Ideal Applications:** Perfect for enterprise data centers, cloud infrastructure providers, HPC environments, and telecommunications facilities requiring scalable, cost-effective 400GB interconnectivity. Direct OEM replacement for Mellanox part MCP7F60-W003R26, ensuring seamless integration into existing deployments. **Why Choose This Cable:** Eliminate vendor lock-in with a fully compatible alternative that delivers identical performance specifications. The 90-day limited warranty provides peace of mind, while free standard shipping on orders over $99 makes this an economical choice for qualified purchases. Ships from Danville, CA and Beaufort, SC locations for rapid delivery.