The JBX06359 4m Cisco Compatible 25GBASE-CR SFP28 Passive Direct Attach Copper Cable represents an excellent solution for organizations seeking reliable, cost-effective high-speed network connectivity. This professional-grade cable is engineered to meet the demanding requirements of modern data centers and enterprise environments. Technical Specifications: This passive DAC cable features 26AWG twinax copper conductors with protective plastic jacketing, delivering exceptional signal integrity over its 4-meter distance. The cable maintains full compliance with IEEE 802.3by specifications and SFF-8402/SFF-8472 standards, ensuring compatibility with Cisco equipment and other compliant network infrastructure. With a data rate of 25GB, it supports next-generation network applications without compromising performance. Key Advantages: Passive DAC cables offer significant benefits over active alternatives, including lower power consumption, reduced operational costs, and zero latency introduction. The SFP28 connector format provides a compact, industry-standard interface compatible with a wide range of networking equipment. The 4-meter length accommodates typical rack-to-rack and switch-to-switch installations in data center environments. Compliance & Certifications: This cable meets stringent international standards including RoHS/ELV directives (EU 2002/95/EC), TUV, and UL certifications, making it suitable for regulated industries and environments with strict compliance requirements. Applications: Ideal for data center interconnects, server-to-switch connections, switch-to-switch links, and high-speed storage area network (SAN) implementations. The cable's passive design makes it particularly suitable for cost-sensitive deployments where power efficiency matters. Operating Environment: Rated for operation between 0-70°C (32-158°F), this cable maintains performance across standard data center temperature ranges. Backed by a 90-day limited warranty, it provides peace of mind for critical network infrastructure investments. Compatibility: Direct replacement for Cisco SFP-H25G-CU4M part numbers and compatible with all IEEE 802.3by compliant equipment featuring SFP28 ports.