The JBX05833 100GBASE-CR4 QSFP28 passive direct attach copper cable represents a critical infrastructure component for modern data center and enterprise networking environments. At 0.5 meters in length, this cable delivers optimal performance for short-reach, high-bandwidth applications where passive solutions provide superior cost-effectiveness compared to active electronics. **Technical Specifications:** This cable utilizes 30AWG twinax copper conductors with professional-grade plastic jacketing, engineered to handle 100GB Ethernet transmission without signal degradation. The QSFP28-to-QSFP28 connector configuration ensures seamless compatibility with both NVIDIA and Mellanox switching infrastructure. Operating temperatures range from 0 to 70°C (32 to 158°F), making it suitable for standard data center climates. **Compliance & Certification:** The JBX05833 adheres to IEEE 802.3bj specifications and qualifies under the QSFP28 MSA (Multi-Source Agreement) standard. RoHS and ELV compliance ensures environmental responsibility, while TUV and UL safety certifications guarantee reliability in enterprise settings. The product meets EU directive 2002/95/EC requirements for reduced hazardous substances. **OEM Compatibility:** This cable directly replaces NVIDIA and Mellanox OEM part numbers including 980-9I621-00E00A, 980-9I627-00C00A, 980-9I626-00C00A, and MCP1600 series variants, offering drop-in compatibility without reconfiguration. **Applications & Use Cases:** Ideal for data center rack interconnects, switch-to-switch uplinks, server cluster communications, and high-performance computing environments. The 0.5m length serves short-distance connections in densely populated server cabinets where space constraints require compact solutions. **Advantages of Passive DAC Technology:** Unlike active cables, passive direct attach solutions consume zero external power, eliminating heat generation and reducing total cost of ownership. The robust copper construction ensures minimal latency and maximum signal integrity for mission-critical applications. **Warranty & Support:** Backed by a 90-day limited warranty and available custom brand programming for enterprise deployments. Ships from US locations with free standard shipping on orders exceeding $99.