The JBX05409 2.5m 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents an essential component for modern data center infrastructure. This high-performance cable delivers exceptional value for organizations requiring reliable, high-speed connectivity without the complexity and expense of active components. **Technical Specifications & Performance** This cable meets rigorous IEEE 802.3ba standards and delivers consistent 40Gbps data transmission over its 2.5-meter length. The 30AWG twinax copper construction provides optimal impedance characteristics for signal integrity, while the plastic jacket offers protection in typical deployment scenarios. The passive design eliminates power requirements, reducing overall system complexity and cooling demands compared to active alternatives. **Brocade Compatibility & Integration** Specifically engineered for Brocade switching environments, this cable replaces OEM part number 40G-QSFP-C-0251, ensuring seamless integration with existing infrastructure. The QSFP+ form factor enables direct connection between compatible switches, routers, and network interface cards without adapters or intermediate equipment. **Compliance & Quality Assurance** Full RoHS compliance (EU directive 2002/95/EC) and certifications from TUV and UL demonstrate commitment to environmental responsibility and safety standards. Manufactured in Vietnam and China using established quality protocols, each cable undergoes rigorous testing before shipment. The 90-day limited warranty provides additional peace of mind. **Ideal Use Cases** Perfect for: data center interconnects, high-speed server connections, storage area networks (SANs), and enterprise switching applications. The 2.5-meter length balances flexibility with performance, suitable for most rack-mounted configurations and intermediate switch-to-switch connections. **Operating Conditions** With an operating temperature range of 0-70°C, this cable performs reliably in temperature-controlled data centers and cooled equipment rooms. Dimensions of 12x12x3mm provide efficient cable routing and management. **Value Proposition** Choose this cable for cost-effective, passive 40Gbps connectivity that eliminates ongoing power costs and maintenance requirements of active alternatives. Combined with free shipping on orders over $99 and enterprise-grade quality standards, it delivers exceptional value for network infrastructure investments.