The JBX05022 400GBASE-CR8 QSFP-DD to 4x QSFP28 breakout direct attach copper cable represents a critical component for modern high-speed data center infrastructure. This 1.5-meter passive cable is engineered to provide seamless connectivity between 400GB-capable network switches and downstream 100GB QSFP28 ports, making it ideal for breakout configurations in enterprise and cloud data centers. Key Technical Specifications: This cable features a robust 30AWG copper conductor with twinax construction, ensuring optimal signal integrity for 400GB transmission rates. The passive breakout design eliminates the need for active components, reducing power consumption and heat generation in densely populated server racks. Operating across a wide temperature range of 0-70°C (32-158°F), the cable maintains performance reliability in various deployment environments. Compatibility and Standards: Perfectly compatible with Arista networking equipment (replacing OEM part CAB-D-4Q-200G-1.5M), this cable is qualified to IEEE 802.3bs and QSFP-DD MSA specifications, ensuring interoperability with certified network infrastructure. The cable meets EU RoHS Directive 2002/95/EC and carries TUV and UL safety certifications, providing confidence in deployment across regulated environments. Applications and Benefits: Ideal for short-reach data center interconnects, this breakout cable enables efficient network scaling by connecting single 400GB ports to multiple 100GB endpoints. Perfect for aggregation switching, top-of-rack deployments, and infrastructure refreshes. The passive design provides cost advantages over active cables while delivering zero-latency performance. Quality Assurance: Backed by a 90-day limited warranty and manufactured in Vietnam and China with rigorous quality control. Ships with free standard shipping on orders exceeding $99 from multiple U.S. distribution centers in California and South Carolina, ensuring rapid availability.