The JBX05338 0.5m Juniper Compatible 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents an essential connectivity solution for modern high-speed networks. This expertly engineered cable combines performance, reliability, and cost-effectiveness to support demanding data center environments. **Technical Excellence** Built to IEEE 802.3ba specifications, this cable delivers consistent 40GB/s data transmission with minimal signal degradation. The 30AWG Twinax copper construction provides optimal impedance matching and signal integrity, while the durable plastic jacketing protects against physical damage and environmental stress. Operating reliably in temperatures from 0 to 70°C (32 to 158°F), it performs consistently across diverse deployment scenarios. **Seamless Compatibility** Designed specifically for Juniper networking equipment, including EX-series, QFX-series, and related platforms, this cable directly replaces OEM part numbers EX-QSFP-40GE-DAC-50CM, JNP-QSFP-DAC-50CM, and QFX-QSFP-DAC-50CM. QSFP+ connectors on both ends ensure plug-and-play installation without additional adapters or converters. **Compliance & Certification** Fully certified for RoHS, ELV, and TUV standards, this cable meets EU Directive 2002/95/EC requirements, making it suitable for European and global deployments. UL safety certification provides additional assurance for enterprise environments. **Practical Advantages** As a passive DAC solution, this cable eliminates the need for active components, reducing operational costs, power consumption, and heat generation compared to active optical cables. The compact 0.5m length is ideal for direct switch-to-server connections, rack-to-rack cabling, and short-distance high-speed interconnects within data centers. **Reliability & Support** Each cable ships with a 90-day limited warranty. Free standard shipping on orders exceeding $99, with convenient fulfillment from multiple U.S. locations (Danville, CA and Beaufort, SC). Custom brand programming is available for enterprise customers requiring specific labeling or integration requirements. Whether upgrading existing infrastructure or deploying new high-speed networks, the JBX05338 delivers enterprise-grade performance at exceptional value.