The JBX05019 is a premium 2.5-meter 400GBASE-CR8 QSFP-DD breakout cable engineered for next-generation data center networks. This passive direct attach copper (DAC) solution provides a cost-effective alternative to active cables and optical transceivers, reducing power consumption while delivering reliable 400GB connectivity. **Key Features:** - **High-Speed Performance**: Supports 400GBASE-CR8 standard with IEEE 802.3bs qualification - **Flexible Breakout Design**: Converts single QSFP-DD connection to four QSFP28 ports for enhanced port density - **Durable Construction**: 28AWG twinax copper conductors with protective plastic jacketing ensure longevity and signal integrity - **Passive Architecture**: No active components or power requirements, reducing complexity and operational costs - **Arista Compatible**: Direct replacement for Arista CAB-D-4Q-200G-2.5M, ensuring seamless integration **Technical Specifications:** - Length: 2.5 meters - Connector Type: QSFP-DD to 4x QSFP28 - Wire Gauge: 28AWG - Data Rate: 400GB - Operating Temperature: 0-70°C (32-158°F) - Standards: IEEE 802.3bs, QSFP-DD MSA, CMIS - Compliance: RoHS/ELV, TUV, UL certified - Dimensions: 12x12x3mm **Ideal Applications:** - Enterprise data center interconnects - High-performance computing clusters - Cloud infrastructure deployments - Server-to-switch connectivity - Storage area networks (SANs) **Quality Assurance:** 90-day limited warranty covers manufacturing defects. Manufactured in Vietnam and China using proven quality standards. Ships from convenient US locations (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99. This cable represents an excellent investment for organizations requiring reliable, high-capacity network connections with minimal latency and maximum cost efficiency.