The JBX06397 0.5m Cisco-compatible 25GBASE-CR SFP28 passive direct attach copper cable represents the gold standard for enterprise-grade networking connectivity. Designed for organizations demanding ultra-reliable, high-speed data transmission, this cable bridges the gap between performance and affordability in modern network infrastructure. **Superior Construction & Materials** Built with premium 30AWG twinax copper conductors and protective plastic jacketing, this cable provides exceptional durability while maintaining optimal signal integrity. The copper connector construction ensures reliable connections in demanding environments, while the compact 0.5m form factor makes it perfect for rack-mounted equipment with minimal cable slack. **Performance & Compatibility** Qualified to IEEE 802.3by specifications and certified to SFF-8402 and SFF-8472 standards, this cable delivers consistent 25Gbps performance. Full Cisco compatibility ensures seamless integration with existing infrastructure, and the cable directly replaces OEM part number SFP-H25G-CU0-5M, simplifying procurement and inventory management. **Energy Efficiency & Reliability** As a passive DAC solution, this cable eliminates the power requirements of active adapters while maintaining superior signal quality. Operating temperature range of 0-70°C accommodates diverse data center environments. The passive design reduces heat generation and potential points of failure. **Compliance & Certifications** Fully RoHS, TUV, and UL certified, this cable meets EU Directive 2002/95/EC standards. These certifications guarantee environmental responsibility and safety compliance for regulated industries. **Ideal Applications** Perfect for: Data center interconnects, server-to-switch connections, storage area networks (SAN), high-frequency trading environments, cloud infrastructure, and enterprise campus networks. **Value & Support** Enjoy free standard shipping on orders over $99, 90-day limited warranty coverage, and custom brand programming availability. Ships from two convenient US locations (Danville, CA and Beaufort, SC) for fast delivery.