The JBX05026 is an industrial-grade 2.5-meter 400GBASE-CR8 QSFP-DD to 4x QSFP56 passive breakout direct attach copper cable engineered for next-generation data center infrastructure. This high-performance interconnect solution bridges the gap between emerging 400GB QSFP-DD line cards and established 100GB QSFP56 switch port ecosystems, enabling cost-effective network capacity scaling without requiring wholesale infrastructure replacement. **Key Features & Benefits:** - **Dual Port Configuration**: Breaks out single 400G QSFP-DD interface into four independent 100G QSFP56 connections - **Passive Design**: Zero power consumption and latency-optimized signal transmission - **Premium Materials**: 28AWG twinax copper conductors with protective plastic jacket ensure durability and performance - **Extended Reach**: 2.5-meter length accommodates flexible rack and cabinet layouts - **Standards Compliance**: Fully qualified to ETC 400GBASE-CR8 specifications, QSFP-DD MSA, and CMIS standards - **Environmental Certifications**: RoHS, TUV, and UL certified for global deployment - **Cisco Compatibility**: Direct drop-in replacement for Cisco OEM part number QDD-4ZQ100-CU2-5M **Technical Specifications:** Form Factor: QSFP-DD to QSFP56 × 4 Data Rate: 400GB per direction Gauge: 28AWG Length: 2.5 meters Operating Temperature: 0–70°C (32–158°F) Material: Copper twinax with plastic jacketing Compliance: RoHS (EU 2002/95/EC), TUV, UL Warranty: 90-day limited warranty **Applications:** Ideal for data center operators, network integrators, and service providers deploying 400GB-capable switching fabric. Perfect for disaggregated network architectures, load balancer buildouts, and multi-tier data center interconnects. Particularly valuable for environments requiring flexible port density without upgrading existing QSFP56-based infrastructure. **Why Choose This Cable:** This passive breakout solution provides superior cost-efficiency compared to powered breakout modules while maintaining rigorous performance standards. The direct copper twinax design ensures minimal signal loss and consistent performance across the full 2.5-meter span. RoHS and international safety certifications make this ideal for regulated enterprise environments. **Shipping & Support:** Enjoy free standard shipping on orders over $99, with expedited options available. Ships from Danville, CA and Beaufort, SC locations for rapid delivery. Custom brand programming available for volume orders. Backed by professional technical support and a straightforward 90-day warranty.