The JBX05979 4m 200GBASE-CR4 QSFP56 Direct Attach Copper cable represents the pinnacle of high-speed network connectivity solutions. Purpose-built for NVIDIA Mellanox environments, this cable delivers the 200Gb/s performance necessary for next-generation data center architectures. Technical Specifications: The cable features premium 26AWG twinax copper conductors with precision-engineered QSFP56 connectors on both ends. As an Active DAC (Direct Attach Copper) solution, it incorporates signal conditioning technology to maintain data integrity over the full 4-meter distance. The cable meets all relevant IEEE 802.3cd specifications and QSFP56 MSA standards, ensuring seamless integration with certified equipment. Compliance & Certification: Fully RoHS and ELV compliant under EU Directive 2002/95/EC, this cable meets stringent environmental and safety requirements. TUV and UL certifications provide additional assurance of quality and reliability. The cable operates reliably across the extended temperature range of 0-70°C (32-158°F), suitable for both standard and thermally challenging environments. Applications & Benefits: Ideal for data center deployments, HPC clusters, and enterprise networking infrastructure where 200Gb/s connectivity is essential. The direct attach copper design eliminates the need for transceivers, reducing costs and complexity while improving power efficiency. The 4-meter length provides optimal flexibility for intra-rack and short-distance inter-rack connections without sacrificing signal quality. Installation & Maintenance: The cable features durable plastic jacketing that protects copper conductors from physical damage while maintaining excellent flexibility. Simple plug-and-play installation requires no configuration. Store in dry conditions and avoid excessive bending to maintain optimal performance. The 90-day limited warranty provides peace of mind for enterprise deployments. Why Choose This Cable: As a direct replacement for the NVIDIA Mellanox MCA1J00-H004E, this cable ensures perfect compatibility with existing infrastructure. Superior copper construction and active technology deliver reliability comparable to OEM solutions at competitive pricing. With free standard shipping on orders over $99 and availability from multiple U.S. warehouses, procurement is convenient and efficient.