The JBX05490 3-meter 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents an essential component for modern data center infrastructure and high-speed networking environments. Specifically engineered for NVIDIA Mellanox compatibility, this cable delivers enterprise-grade performance at a cost-effective price point. **Technical Specifications & Performance:** This passive direct attach copper (DAC) cable utilizes 30AWG twinax construction, providing optimal signal integrity for 40GB data transmission. The cable meets IEEE 802.3ba and SFF-8436 standards, ensuring reliable performance in demanding network environments. With a 3-meter length, it offers flexibility for various rack configurations and cable management scenarios without compromising signal quality. **Build Quality & Durability:** Constructed with copper conductors and protective plastic jacketing, the cable withstands rigorous data center environments. The durable design maintains consistent performance across operating temperatures from 0 to 70°C (32 to 158°F), making it suitable for both climate-controlled facilities and edge computing deployments. **Compliance & Certification:** The cable meets RoHS (Restriction of Hazardous Substances) and ELV directives, ensuring environmental responsibility without sacrificing performance. Safety certifications include RoHS, TUV, and UL compliance, providing confidence in reliability and safety standards. **Compatibility & Integration:** Designed as a direct replacement for OEM part numbers MCP1700-B003E, MC2210130-003, and MC2206130-003, integration into existing NVIDIA Mellanox infrastructure is seamless. The QSFP+ connector format ensures compatibility with latest generation switches, routers, and network adapters. **Cost-Effective Solution:** Passive DAC technology eliminates the need for active electronics, reducing power consumption and heat generation while maintaining exceptional performance. This makes it an economical choice for scaling network infrastructure without increasing operational costs. **Shipping & Support:** Enjoy free standard shipping on orders over $99, with fulfillment from strategically located warehouses in Danville, CA and Beaufort, SC. Every purchase includes a 90-day limited warranty and professional support. Ideal for enterprise data centers, cloud providers, telecommunications infrastructure, and organizations requiring reliable 40GB interconnectivity with NVIDIA Mellanox switching equipment.