The JBX05095 3-meter 400GBASE-CR8 QSFP-DD direct attach copper cable represents a cost-effective, high-performance solution for enterprise-grade network infrastructure requiring 400GB connectivity. Engineered as a direct replacement for Cisco's QDD-400-CU3M, this passive DAC cable delivers reliable, low-latency data transmission without requiring power consumption or active electronics. **Technical Specifications & Performance:** This QSFP-DD DAC features 26AWG twinax copper conductors with premium plastic jacketing, delivering consistent performance across the 3-meter length. The cable achieves full 400GB/s data rates while maintaining signal integrity and minimizing electromagnetic interference. Operating temperatures range from 0-70°C (32-158°F), making it suitable for both standard and challenging datacenter environments. **Compliance & Certifications:** Fully compliant with ETC 400GBASE-CR8 specifications and QSFP-DD MSA (Multi-Source Agreement) standards, the cable meets rigorous industry requirements. RoHS (Restriction of Hazardous Substances), TUV, and UL certifications ensure adherence to international safety, environmental, and quality standards. EU Directive 2002/95/EC compliance confirms minimal hazardous material content. **Use Cases & Applications:** Ideal for high-density data centers, cloud infrastructure, and enterprise networks requiring cost-effective 400GB interconnectivity. Passive DAC technology eliminates active component reliability concerns while providing superior performance-to-price ratios compared to active cables or fiber optics for short-reach applications. **Key Advantages:** - Zero power consumption for passive operation - Lower latency than active alternatives - Reduced thermal footprint in dense environments - Direct Cisco compatibility ensures plug-and-play deployment - Durable copper construction with extended operational lifespan - RoHS and international safety certified **Warranty & Support:** 90-day limited warranty provides peace of mind on component integrity and performance. Ships rapidly from US facilities (Danville, CA or Beaufort, SC) with free standard shipping on orders exceeding $99.