The JBX05566 4m 100GBASE-CR4 QSFP28 to 4x SFP28 direct attach copper cable represents a cost-effective, high-performance solution for enterprise-grade data center networking. As a passive breakout DAC cable, it eliminates the complexity and power consumption associated with active optical transceivers while delivering exceptional signal integrity and throughput. Technical Excellence: This cable is engineered to IEEE 802.3bj specifications, ensuring compliance with industry standards for 100Gbps Ethernet transmission. The 26AWG twinax construction provides optimal impedance matching and signal integrity for copper-based interconnects. QSFP28 MSA and SFF-8665 standards qualification guarantees compatibility across leading data center equipment from Arista and other manufacturers. Key Features: - 4-meter breakout configuration enables flexible data center cabling - Passive design requires no additional power, reducing operational complexity - RoHS and ELV compliant materials ensure environmental responsibility - Copper connectors with gold-plated contacts resist corrosion - Operating temperature range: 0-70°C handles diverse deployment scenarios Applications & Use Cases: Ideal for high-density switch interconnects, server-to-switch connections, and storage area network implementations. The passive breakout design is particularly suited for short-reach, high-bandwidth applications where cost efficiency and power consumption are critical considerations. Reliability & Support: Backed by comprehensive RoHS, TUV, and UL safety certifications, this cable meets stringent quality standards. Direct replacement for Arista CAB-Q-4S-100G-4M ensures drop-in compatibility. Ships from US locations (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99, and custom branding options available for enterprise deployments. Optimal for IT professionals, network architects, and data center managers seeking reliable, cost-effective 100Gbps breakout solutions.