The JBX05646 is a professional-grade 2.5-meter 100GBASE-CR4 QSFP28 to 4x SFP28 Direct Attach Copper breakout cable engineered for demanding data center and high-performance computing environments. This passive breakout DAC eliminates the need for power consumption while delivering full 100Gb/s bandwidth, making it an economical choice for network infrastructure upgrades. **Key Technical Features:** Constructed with 30AWG twinax copper conductors and protective plastic jacketing, this cable meets IEEE 802.3bj and QSFP28 MSA specifications. The QSFP28 connector breakout design enables seamless integration with NVIDIA Mellanox switches, servers, and network adapters, supporting simultaneous 25Gb/s connections across four SFP28 ports. **Compatibility & Integration:** This cable directly replaces NVIDIA Mellanox OEM part numbers 980-9I48S-00C02A, 980-9I48T-00C02A, and MCP7F00 series variants, ensuring guaranteed compatibility without performance compromise. Ideal for blade server deployments, switch uplink configurations, and storage area network (SAN) applications. **Quality & Compliance:** Fully certified to RoHS, TUV, and UL standards in compliance with EU Directive 2002/95/EC. The cable operates reliably between 0-70°C and features robust construction suitable for rack-mounted installations. All components utilize copper connectors with precise gold plating for superior signal integrity and connector longevity. **Deployment Advantages:** Passive DAC cables require no external power or active electronics, reducing total cost of ownership and operational complexity. The 2.5-meter length accommodates mid-range distances in typical data center rack configurations. With free standard shipping on orders exceeding $99 and a 90-day limited warranty, this solution delivers excellent value for network infrastructure expansion and modernization projects. Ships from US locations in California and South Carolina for expedited delivery.