The JBX06531 400GBASE-CR8 QSFP-DD to 4x QSFP28 Direct Attach Copper (DAC) breakout cable represents a premium solution for modern data center infrastructure requiring high-speed, cost-effective connectivity. This 1-meter passive breakout cable seamlessly bridges 400GB QSFP-DD ports to multiple 100GB QSFP28 interfaces, providing essential flexibility for network architects and operators. Technical Specifications: This cable features 30AWG twinax copper conductors with advanced plastic jacketing, engineered to exceed IEEE 802.3bs specifications for 400GBASE-CR8 transmission. The QSFP-DD MSA and CMIS-compliant design ensures compatibility with enterprise-grade networking equipment from leading manufacturers including Arista Networks. Operating across temperatures from 0°C to 70°C (32°F to 158°F), this cable maintains consistent performance in diverse data center environments. Key Advantages: Passive Direct Attach Copper technology eliminates external power requirements, reducing operational overhead and heat generation compared to active alternatives. The 1-meter length is specifically optimized for rack-to-rack and short-reach connections within densely populated server environments. At 30AWG gauge, the cable balances flexibility with signal integrity, enabling easier installation in tight spaces. Compliance & Certification: Fully certified under RoHS and EU directive 2002/95/EC, with TUV and UL safety certifications ensuring environmental responsibility and equipment protection. The cable meets stringent industry standards for data transmission reliability. Applications: Ideal for data center switching infrastructure, high-performance computing clusters, storage area networks, and cloud service provider environments. The breakout functionality allows operators to maximize port utilization and simplify network topology management. Shipping & Support: Shipped from domestic warehouses in Danville, CA and Beaufort, SC for rapid delivery. Includes 90-day limited warranty and qualifies for free standard shipping on orders exceeding $99. Custom brand programming available for enterprise deployments. This Arista-compatible cable replaces OEM part number H-D400-4Q100-1M, offering premium performance at competitive pricing for organizations demanding reliability and speed.