The JBX05391 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents a cost-effective and reliable solution for modern data center and enterprise networking applications. With a compact 1-meter length, this cable provides the ideal connectivity distance for rack-mounted equipment, storage arrays, and switch configurations without the complexity of active components. Key Features & Specifications: This passive DAC cable utilizes high-quality 30AWG twinax copper construction, ensuring optimal signal integrity and minimal electromagnetic interference. The QSFP+ form factor provides universal compatibility with HPE H3C equipment and other standards-compliant networking devices. Operating at 40GB data rates, it's designed to meet the demanding throughput requirements of modern virtualized environments and cloud infrastructure. Compliance & Certifications: Fully certified to IEEE 802.3ba and SFF-8436 standards, the JBX05391 meets all EU directives including RoHS (2002/95/EC) compliance. Additional safety certifications from TUV and UL ensure safe operation in diverse networking environments. The cable maintains performance across operating temperatures from 0-70°C (32-158°F). Advantages of Passive DAC Technology: Unlike active cables, passive DACs eliminate concerns about firmware compatibility and component lifespan, offering pure plug-and-play simplicity. This reduces total cost of ownership while delivering superior performance for shorter interconnect distances. The absence of active electronics means zero power consumption and no heat generation. Applications & Compatibility: Ideal for connecting HPE H3C switches, routers, and servers; enterprise data center upgrades; high-performance computing clusters; and network storage systems. Replaces OEM part JG326A seamlessly in existing HPE infrastructure. Warranty & Support: 90-day limited warranty provides peace of mind. Free standard shipping available on orders over $99, with convenient fulfillment from distribution centers in Danville, CA and Beaufort, SC. Custom brand programming available for enterprise procurement needs.