The JBX05420 40GBASE-CR4 QSFP+ passive direct attach copper cable represents an essential connectivity solution for modern data center and enterprise network environments. This professionally manufactured 2.5-meter cable combines proven passive DAC technology with Juniper ecosystem compatibility, making it an ideal replacement for aging or damaged cables in existing deployments. Technical Excellence and Performance: Constructed with 30AWG twinax copper conductors, the cable delivers optimal impedance matching and signal propagation essential for reliable 40GB Ethernet transmission. The copper connectors ensure superior conductivity and durability compared to standard alternatives. Operating across an industrial temperature range of 0-70°C (32-158°F), this cable maintains consistent performance in demanding server room and network cabinet environments. Compliance and Certification: Fully qualified to IEEE 802.3ba specifications and SFF-8436 standards, the JBX05420 meets stringent industry requirements for high-speed data transmission. RoHS and ELV compliance ensures environmental responsibility and regulatory adherence across global markets. Comprehensive safety certifications from TUV and UL validate the cable's integrity and reliability. Cost-Effective Connectivity: The passive design eliminates active components and power requirements, reducing operational complexity and costs while extending equipment lifespan. Unlike active optical cables, passive DACs require no external power sources, making them ideal for power-constrained environments and providing a total cost of ownership advantage. Juniper Compatibility: Direct replacement for OEM part numbers EX-QSFP-40GE-DAC-250CM, QFX-QSFP-DAC-250CM, and JNP-QSFP-DAC-250CM, this cable integrates seamlessly with Juniper EX, QFX, and MX series equipment. The QSFP+ form factor ensures universal compatibility with modern network switches and routers. Reliability and Support: Backed by a 90-day limited warranty and manufactured in Vietnam and China, this cable undergoes rigorous quality testing. Custom brand programming is available for organizations requiring OEM labeling. Free standard shipping on qualifying orders and availability from multiple fulfillment centers ensure rapid deployment.