The JBX05079 0.5m 400GBASE-CR8 QSFP-DD to 8x SFP56 Direct Attach Copper Cable represents the ideal solution for enterprises upgrading to 400G network infrastructure. This passive breakout DAC eliminates the need for expensive active electronics while delivering exceptional performance and reliability in data center environments. **Key Features & Specifications:** - Connector Type: QSFP-DD to 8x SFP56 configuration - Cable Length: 0.5 meters (compact for rack-mounted deployments) - Wire Gauge: 30AWG twinax for optimal signal quality - Data Rate: 400GB with 400GBASE-CR8 compliance - Materials: Copper conductors with plastic jacketing - Operating Temperature Range: 0 to 70°C (32 to 158°F) **Compliance & Certifications:** This cable meets stringent international standards including ETC 400GBASE-CR8, QSFP-DD MSA, and CMIS specifications. It carries RoHS/ELV certification per EU Directive 2002/95/EC and holds UL and TUV safety certifications, ensuring compatibility with regulated environments and compliance with environmental standards. **Applications:** Ideal for data centers, high-performance computing clusters, cloud service providers, and enterprise network deployments requiring breakout connectivity from 400G QSFP-DD ports to multiple 100G SFP56 channels. The short 0.5m length makes it perfect for top-of-rack switching, server interconnects, and high-density equipment configurations. **Superior Value Proposition:** As a passive solution, this cable requires no power consumption or active electronics management, reducing total cost of ownership and operational complexity. Its Arista compatibility ensures seamless integration into existing infrastructure. The cable ships from US locations (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99 and includes a 90-day limited warranty. **Custom Options Available:** Custom brand programming is available upon request, making this solution adaptable for OEM, reseller, and enterprise deployment scenarios. Whether replacing Arista's CAB-D-8S-400G-0.5M or deploying new infrastructure, the JBX05079 delivers proven performance and reliability.