The JBX05023 1m 400GBASE-CR8 QSFP-DD to 4x QSFP28 Direct Attach Copper Cable represents cutting-edge networking connectivity for modern data centers and enterprise infrastructure. This premium breakout cable combines exceptional performance with cost-effectiveness, making it an ideal solution for organizations upgrading to 400G network architecture. **Key Features and Specifications:** Designed as a passive breakout DAC cable, the JBX05023 eliminates the need for active electronics, reducing power consumption and heat generation while maintaining exceptional signal integrity. The 30AWG twinax copper construction ensures optimal electrical performance across the full 1-meter length, supporting 400GB data rates without signal degradation. The cable's compact 12x12x2 inch form factor facilitates easy installation in high-density switch environments. **Arista Compatibility and Performance:** This cable directly replaces the Arista CAB-D-4Q-200G-1M part number, ensuring seamless integration with existing Arista switch infrastructure. Full compliance with ETC 400GBASE-CR8 specifications and QSFP-DD MSA standards guarantees reliable operation in demanding network environments. The QSFP-DD to 4x QSFP28 configuration provides flexible breakout capabilities, allowing single 400G ports to partition into four 100G connections. **Compliance and Reliability:** RoHS and ELV compliant with TUV and UL safety certifications, this cable meets stringent international standards for environmentally responsible and safe network equipment. The robust plastic jacketing protects copper conductors from environmental factors while maintaining flexibility for installation in tight spaces. Operating temperature range of 0-70°C ensures reliable performance across diverse data center conditions. **Applications:** Ideal for 100GB and 400GB network deployments, hyperscale data centers, cloud infrastructure, and enterprise network upgrades. Perfect for organizations requiring cost-effective, high-performance interconnects without the complexity and expense of active optical solutions. **Warranty and Support:** Backed by a comprehensive 90-day limited warranty, with free standard shipping on orders over $99. Ships from multiple US locations (Danville, CA and Beaufort, SC) for rapid delivery. Custom brand programming available for OEM and integration partners.