The JBX05274 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents a cost-effective and efficient solution for demanding network infrastructure applications. Measuring 4 meters in length with industry-standard QSFP+ connectors on both ends, this passive DAC cable provides direct, low-latency connectivity between compatible networking equipment without requiring external power sources. **Key Features:** - **40GB Data Rate**: Supports full 40GBASE-CR4 performance for bandwidth-intensive applications - **Passive Design**: Eliminates power consumption and heat generation compared to active alternatives - **28AWG Copper Twinax**: Superior signal integrity and reduced electromagnetic interference - **Compact Form Factor**: 4-meter length optimizes spacing in rack-mounted environments - **Brocade Compatibility**: Direct replacement for Brocade networking solutions - **IEEE 802.3ba Certified**: Meets stringent industry standards for 40GB Ethernet **Compliance & Certifications:** This cable exceeds RoHS (Directive 2002/95/EC) and ELV requirements, carrying TUV and UL safety certifications. The passive construction ensures minimal electromagnetic emissions, making it suitable for regulated environments. **Ideal Applications:** - Data center network upgrades and expansions - High-performance storage area networks (SANs) - Virtualization infrastructure - Server cluster interconnection - Cloud computing environments **Technical Specifications:** - Operating Temperature: 0-70°C (32-158°F) - Copper Connectors: QSFP+ to QSFP+ - Gauge: 28AWG - Materials: Copper with plastic jacketing - Country of Manufacture: Vietnam, China - 90-Day Limited Warranty included The passive design delivers substantial cost savings over active optical alternatives while maintaining superior performance. Ships from multiple U.S. locations (Danville, CA and Beaufort, SC) with free standard shipping on qualified orders, ensuring rapid deployment of your network infrastructure upgrades.