The JBX05020 represents a high-performance solution for data center operators, network engineers, and enterprise IT professionals seeking reliable 400GB connectivity without premium pricing. This 3-meter 400GBASE-CR8 QSFP-DD to 4x QSFP28 direct attach copper breakout cable provides a direct replacement for the Arista CAB-D-4Q-200G-3M, delivering identical performance characteristics at competitive cost. **Technical Specifications & Construction** Built with 28AWG twinax copper conductors and professional-grade plastic jacketing, the JBX05020 offers excellent signal integrity over the full 3-meter run. The cable's passive design eliminates power consumption and heat generation, making it ideal for high-density switch installations. Gold-plated connectors on both the QSFP-DD source end and four QSFP28 breakout ends ensure lasting durability and superior contact reliability. **Performance & Compatibility** Qualified to IEEE 802.3bs standards and QSFP-DD MSA specifications, this cable supports full 400GBASE-CR8 transmission rates. The breakout configuration enables intelligent network scaling, allowing a single 400GB QSFP-DD port to provision four independent 100GB QSFP28 connections. This flexibility is particularly valuable in mixed-generation network environments where legacy 100GB equipment coexists with newer 400GB infrastructure. **Compliance & Safety** Fully RoHS and TUV certified, the cable meets EU Directive 2002/95/EC environmental requirements. UL safety certification confirms adherence to North American electrical standards. These certifications matter for enterprise deployments requiring documented compliance with corporate procurement policies and data center specifications. **Practical Applications** Ideal for deployment in high-performance computing clusters, cloud data centers, and enterprise backbone networks. The 3-meter length accommodates typical switch-to-switch and switch-to-equipment distances in standard 19-inch rack layouts. Operating temperature range of 0-70°C supports both air-conditioned data centers and equipment rooms with variable climate control. **Value Proposition** With free standard shipping on orders exceeding $99 and a 90-day limited warranty, this cable represents excellent value for budget-conscious network operators. Custom brand programming is available for organizations seeking standardized asset management. Ships from multiple US locations (Danville, CA and Beaufort, SC) for faster delivery. **Why Choose This Cable** The JBX05020 eliminates expensive proprietary lock-in while delivering manufacturer-equivalent performance. IT teams benefit from proven Arista compatibility without paying OEM premiums. For network architects balancing performance, compliance, and cost, this direct attach copper breakout cable offers the optimal solution for modern 400GB deployments.