The JBX05263 10-meter Cisco Compatible 40GBASE-CR4 QSFP+ Active Direct Attach Copper Cable represents an optimal solution for enterprise data centers and high-performance computing environments demanding reliable, cost-effective connectivity. This active DAC cable combines exceptional performance with practical affordability, eliminating the expense associated with optical transceivers while delivering consistent 40GB throughput. **Technical Excellence:** Built to IEEE 802.3ba specifications, this cable features premium 28AWG twinax copper construction with integrated active circuitry that extends transmission capabilities beyond passive alternatives. QSFP+ connectors provide secure, reliable connections with minimal signal loss, ensuring stable 40GB data rates across the full 10-meter length. The cable's active design compensates for signal degradation, making it ideal for challenging installations. **Compliance & Certification:** Fully RoHS and TUV certified per EU directive 2002/95/EC, this cable meets stringent environmental and safety standards. Its comprehensive certification portfolio (RoHS, TUV, UL) demonstrates commitment to quality and regulatory compliance, providing peace of mind in regulated environments. **Superior Performance Characteristics:** With an operating temperature range of 0-70°C (32-158°F), this cable performs reliably in varied data center conditions. The copper connectors resist oxidation and degradation, ensuring long-term performance. Its compact 12x12x10mm dimensions optimize space utilization in equipment-dense installations. **Compatibility & Applications:** Designed as a direct replacement for Cisco OEM part number QSFP-H40G-ACU10M, this cable integrates seamlessly with existing Cisco infrastructure. Ideal applications include: - Switch-to-server interconnections - Storage array connections - Backup system links - High-speed cluster communications - 40G-capable switch stacking **Value & Support:** Includes a 90-day limited warranty covering manufacturing defects. Custom brand programming is available for OEM requirements. Ships from strategically located US facilities (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99, delivering exceptional value for volume purchases.