The JBX05688 4m 100GBASE-CR4 QSFP28 Passive Direct Attach Copper Cable represents a mission-critical solution for enterprises and data centers requiring high-speed, reliable network connectivity. This passive DAC cable eliminates the complexity and expense of active electronics while delivering consistent 100GB performance, making it an ideal choice for budget-conscious infrastructure managers. Construction & Materials: Built with premium 26AWG twinax copper conductors and protective plastic jacketing, this cable provides exceptional signal integrity while maintaining flexibility for dense cable routing. The passive design ensures zero power consumption and eliminates heat generation—critical factors in crowded server environments. Technical Excellence: Fully qualified to IEEE 802.3bj specifications and QSFP28 MSA standards, the JBX05688 guarantees plug-and-play compatibility with NVIDIA Mellanox switching and networking equipment. It directly replaces OEM part numbers MCP1600-C004, MCP1600-C004E26L, MCP1600-E004E26, and 980-9I62Y-00E004. Compliance & Safety: RoHS and TUV certified to meet EU directive 2002/95/EC and international safety standards, ensuring your infrastructure meets regulatory requirements. Operating temperature range of 0-70°C accommodates virtually any data center environment. Applications: Perfect for InfiniBand fabrics, data center spine-leaf architectures, high-performance computing clusters, and enterprise switching fabrics. The 4-meter length optimally bridges equipment racks without excessive slack. Value Proposition: At a fraction of fiber optic system costs, this passive DAC delivers comparable performance for short-reach connections (under 5 meters). Zero latency, zero active power draw, and zero maintenance requirements make it the economical choice for density-focused deployments. Shipping & Support: Qualifies for free standard shipping on orders exceeding $99, with regional fulfillment from Danville, CA and Beaufort, SC locations. Backed by a comprehensive 90-day limited warranty and custom branding options available for volume orders.