The JBX05019 2.5m 400GBASE-CR8 QSFP-DD to 4x QSFP28 direct attach copper cable represents the ideal solution for organizations requiring high-capacity, low-latency network connectivity in demanding data center environments. This passive breakout DAC cable seamlessly converts a single 400G QSFP-DD port into four independent 100G QSFP28 connections, enabling flexible network architecture scaling without the need for active electronics or power consumption. Key Technical Specifications: This cable features premium 28AWG twinax copper construction engineered to deliver maximum signal fidelity across the 2.5-meter span. The copper connectors provide superior conductivity compared to alternative materials, ensuring minimal signal degradation and crosstalk. The cable is fully qualified to ETC 400GBASE-CR8 specifications and meets QSFP-DD MSA and CMIS standards, guaranteeing compatibility with current and next-generation networking equipment. Compliance and Certification: The cable maintains full RoHS/ELV compliance per EU directive 2002/95/EC, making it suitable for global deployment. Multiple safety certifications including UL and TUV testing ensure the cable meets rigorous industry safety standards. The RoHS certification eliminates hazardous substances, supporting environmentally responsible procurement initiatives. Application Benefits: Designed as a drop-in replacement for the Arista CAB-D-4Q-200G-2.5M, this cable simplifies procurement and reduces vendor complexity for Arista-based deployments. The passive breakout design is ideal for high-density network deployments where power consumption and heat generation must be minimized. Perfect for enterprise data centers, cloud infrastructure, and service provider networks requiring 400G-to-100G port density transformation. Operational Reliability: With operating temperature support from 0-70°C (32-158°F), the cable performs reliably in both standard and elevated-temperature environments. The durable plastic jacketing provides protection against physical stress during installation and maintenance. Backed by a 90-day limited warranty and available for drop-ship from Danville, CA or Beaufort, SC, ensuring rapid deployment. Custom brand programming available for integration into white-label solutions.