The JBX05681 4-meter 100GBASE-CR4 QSFP28 passive direct attach copper cable represents an industry-standard solution for high-speed enterprise networking. Designed specifically for HPE networking equipment, this cable provides a reliable, cost-effective alternative to optical solutions while maintaining exceptional performance and signal integrity. Key Features: • 4-meter length optimized for short-reach data center deployments • 26AWG twinax copper construction ensures superior signal quality • Passive DAC technology eliminates power consumption • QSFP28 connectors on both ends for seamless integration • 100GB data rate supporting modern enterprise traffic demands Technical Specifications: Compliant with IEEE 802.3bj standards and QSFP28 Multi-Source Agreement specifications, this cable operates within 0-70°C temperature range, making it suitable for standard data center environments. The copper construction with plastic jacketing provides durability and flexibility for rack installations. Certifications & Compliance: Fully RoHS and ELV compliant per EU Directive 2002/95/EC, with TUV and UL safety certifications. Meets all harmonization code 8544.42.9090 requirements. Applications: Ideal for top-of-rack switches, server-to-switch connectivity, and storage area network (SAN) deployments. Perfect for organizations seeking reliable, low-latency interconnections without optical transceiver costs. Compatibility: Direct replacement for HPE part R9F74A-4M. Ensures seamless integration with existing HPE Networking infrastructure. Value Proposition: Choose this passive DAC cable for cost-effective 100GB connectivity with zero power consumption, minimal latency, and hassle-free deployment. Ships from multiple US locations with free standard shipping on qualifying orders. 90-day limited warranty included.