The JBX05274 4m Brocade Compatible 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents an ideal solution for modern data center infrastructure requiring high-speed, low-latency networking connectivity. This premium-grade cable combines advanced engineering with proven reliability to deliver consistent 40GB performance across enterprise environments. **Technical Excellence & Compliance:** Manufactured to IEEE 802.3ba and SFF-8436 specifications, this cable undergoes rigorous testing to ensure exceptional performance standards. The 28AWG twinax construction optimizes signal transmission while maintaining structural integrity. Full RoHS, TUV, and UL certification demonstrates commitment to safety and environmental responsibility, aligning with EU directive 2002/95/EC requirements. **Passive DAC Architecture:** Unlike active DAC cables, this passive design provides significant advantages: zero power consumption, minimal heat generation, and elimination of complex signal processing. This translates to lower operational costs, reduced cooling requirements, and enhanced system reliability. Perfect for rack-dense environments where thermal management is critical. **Superior Connectivity:** COPPER QSFP+ connectors ensure secure, reliable connections with Brocade switches and compatible networking equipment. The 4-meter length provides optimal flexibility for typical data center rack configurations while maintaining signal quality over the entire transmission path. **Durability & Protection:** Durable plastic jacketing protects against environmental hazards, accidental abrasion, and physical stress. Rated for 0-70°C operating temperatures, this cable performs reliably in diverse deployment scenarios from climate-controlled data centers to moderately variable environments. **Value & Support:** Designed as a cost-effective alternative to OEM solutions (replaces Brocade P/N 40G-QSFP-C-0401), this cable delivers professional-grade performance without premium pricing. Custom brand programming is available for organizations requiring proprietary identification. Comprehensive 90-day limited warranty provides peace of mind. **Applications:** Ideal for enterprise data centers, cloud infrastructure, high-performance computing clusters, and any environment requiring reliable 40GB Ethernet connectivity. Particularly valuable for organizations standardized on Brocade networking architecture seeking affordable, compatible connectivity solutions. With free standard shipping on orders exceeding $99 and availability from multiple U.S. locations (Danville, CA and Beaufort, SC), this cable combines technical excellence with practical convenience.