The JBX05049 1.5m 400GBASE-CR8 QSFP-DD to 4x QSFP56 Direct Attach Copper (DAC) breakout cable represents a cost-effective solution for modern data center infrastructure upgrades. This passive breakout cable eliminates the need for expensive active modules while maintaining exceptional signal quality at 400GB speeds. **Key Features & Benefits:** Passive design reduces power consumption and heat generation compared to active breakout solutions. The 30AWG twinax copper construction ensures superior signal integrity and reduces crosstalk in high-density port environments. At just 1.5 meters, this cable length provides optimal flexibility for typical server-to-switch configurations without excess slack. **Technical Specifications:** Fully qualified to ETC 400GBASE-CR8 specifications and IEEE standards for 400GB+ interconnects. The QSFP-DD to 4x QSFP56 configuration enables seamless integration with existing 100GB infrastructure while supporting next-generation 400GB systems. Operating temperature range of 0-70°C accommodates standard and elevated-temperature data center environments. **Compliance & Safety:** Manufactured to RoHS and ELV directives per EU 2002/95/EC. TUV and UL certifications validate safety and performance standards. Ships with 90-day limited warranty. **Ideal Applications:** Enterprise data centers, cloud service providers, high-performance computing facilities, and network backbone upgrades. Perfect for organizations transitioning from 100GB to 400GB infrastructure while leveraging existing QSFP56-based hardware. **Shipping & Support:** Free standard shipping on qualifying orders. Available from Danville, CA and Beaufort, SC distribution centers. Custom brand programming available for enterprise deployments.