The JBX05028 is a premium-grade 2.5-meter 400GBASE-CR8 breakout cable engineered to meet the demanding requirements of modern data center and enterprise networking environments. This passive direct attach copper (DAC) cable provides a cost-effective solution for high-speed connectivity without compromising on performance or reliability. **Key Features:** This QSFP-DD to 4x QSFP56 breakout configuration enables efficient signal distribution from a single 400GB port to four separate 100GB connections, maximizing flexibility in network architecture design. The 28AWG copper construction ensures minimal signal attenuation and superior electromagnetic shielding, critical for maintaining signal integrity in high-density deployments. **Compatibility & Standards:** Fullly compatible with NVIDIA Mellanox infrastructure, the cable replaces OEM part numbers 980-9I822-00W02A and MCP7F60-W02AR26. It qualifies to ETC 400GBASE-CR8 and QSFP-DD MSA specifications, with support for CMIS standards for enhanced device interoperability. **Technical Specifications:** Operating range: 0-70°C (32-158°F), with dimensions of 12x12x3 inches. The cable carries a 90-day limited warranty and includes RoHS, TUV, and UL safety certifications, ensuring compliance with EU directive 2002/95/EC. Manufactured in Vietnam and China with precision engineering for consistent performance. **Applications:** Ideal for hyperscale data centers, cloud infrastructure, high-performance computing clusters, and enterprise switching environments where 400GB connectivity and cost-effective breakout solutions are required. Ships with free standard shipping on orders over $99 from locations in Danville, CA and Beaufort, SC.