The JBX06535 400GBASE-CR8 QSFP-DD breakout cable represents the ideal solution for network engineers and data center operators requiring reliable, high-speed interconnectivity. This 5-meter passive direct attach copper (DAC) cable provides a cost-effective alternative to active optical solutions while maintaining exceptional performance standards. **Key Features:** - 400GBASE-CR8 compliance for maximum data throughput - QSFP-DD to 4x QSFP28 breakout configuration - 28AWG twinax copper conductors for optimal signal quality - Passive design eliminates power consumption concerns - 5-meter length ideal for rack-to-rack connections - Fully compatible with Arista H-D400-4Q100-5M systems **Technical Specifications:** Operating at speeds up to 400GB, this cable adheres to IEEE 802.3bs specifications and QSFP-DD Multi-Source Agreement (MSA) standards. The cable supports CMIS compliance for enhanced management capabilities. Construction features copper connectors and plastic jacketing, manufactured in Vietnam and China to exacting quality standards. **Performance & Reliability:** Rated for operating temperatures from 0 to 70°C (32 to 158°F), this cable performs consistently across diverse environment conditions. Each unit includes a comprehensive 90-day limited warranty, backed by our commitment to customer satisfaction. RoHS and ELV directives compliance ensures environmental sustainability without compromising performance. **Ideal Applications:** Perfect for high-speed Ethernet deployments in data centers, cloud infrastructure, HPC environments, and enterprise networking. The breakout configuration accommodates network virtualization and server interconnect scenarios where port density and cost optimization are critical. **Why Choose This Cable:** Avoid expensive vendor lock-in with this compatible alternative that delivers OEM-quality performance at competitive pricing. Free standard shipping on orders over $99, with warehouses in Danville, CA and Beaufort, SC for rapid delivery.