The JBX05921 1.5m 200GBASE-CR4 QSFP56 breakout DAC cable represents a critical component for modern high-speed data center networking. Designed specifically for NVIDIA Mellanox environments, this passive direct attach copper cable delivers exceptional performance and reliability at a fraction of the cost of active alternatives. **Technical Specifications:** This cable features a robust 30AWG twinax copper design with plastic jacketing, measuring 12x12x2mm in dimensions. Operating over temperatures from 0 to 70°C, it maintains consistent performance across diverse environment conditions. The cable achieves full 200GB transmission rates and is qualified to IEEE 802.3cd and QSFP56 MSA specifications, ensuring compatibility with current and emerging networking standards. **Performance & Compatibility:** The JBX05921 breaks out a single 200GBASE-CR4 QSFP56 port into two separate QSFP56 connections, enabling flexible network topology configurations. It's specifically compatible with NVIDIA Mellanox networking platforms and replaces multiple OEM part numbers including 980-9I98G-00H01A, MCP7H50-H01AR30, and variants, providing easy upgradability for existing installations. **Regulatory Compliance:** Fully RoHS and ELV compliant under EU Directive 2002/95/EC, this cable meets TUV and UL safety certifications. Its passive design eliminates electromagnetic interference concerns and power consumption issues, making it an environmentally responsible choice for enterprise deployments. **Practical Applications:** Ideal for data center interconnects, high-performance computing clusters, and enterprise storage networks. The 1.5-meter length provides optimal flexibility for intra-rack and adjacent rack connections without excessive slack. The passive breakout configuration is perfect for cost-sensitive deployments requiring high-speed, low-latency connectivity. **Value Proposition:** Compared to active cables and transceiver-based solutions, this passive DAC cable offers significant cost savings while delivering identical performance metrics. The 90-day limited warranty provides peace of mind, while free standard shipping on orders exceeding $99 adds further value. Custom brand programming is available for OEM applications, making this solution scalable for large-scale deployments. Ships from convenient US locations (Danville, CA and Beaufort, SC) for rapid delivery.