The JBX05839 0.5m 100GBASE-CR4 QSFP28 Passive Direct Attach Copper Cable represents an essential connectivity solution for modern enterprise data centers and high-performance computing environments. As a Palo Alto Networks compatible component, this cable seamlessly integrates with existing network infrastructure while delivering exceptional value and reliability. **Product Overview:** This passive direct attach copper (DAC) cable combines cutting-edge high-speed transmission with proven reliability. The 0.5-meter length makes it ideal for short-distance, high-bandwidth connections between adjacent network switches, servers, and storage devices within data center racks and nearby equipment. **Technical Specifications:** • Data Rate: 100GB full-duplex performance • Cable Type: Passive DAC with 30AWG twinax copper construction • Connectors: QSFP28 male to QSFP28 male with gold-plated contacts • Operating Temperature: 0°C to 70°C (32°F to 158°F) • Material: High-quality copper with protective plastic jacketing • Dimensions: Compact 12x12x2mm form factor • Weight: Lightweight for easy installation **Standards & Certifications:** Fully compliant with IEEE 802.3bj specifications and QSFP28 MSA (Multi-Source Agreement) standards, ensuring interoperability and performance consistency. RoHS and ELV directive compliance meets international environmental regulations. TUV and UL safety certifications guarantee electrical safety and reliability. **Key Advantages:** Passive DAC technology eliminates the need for power consumption, reducing operational costs and heat generation compared to active cables. The robust copper construction provides superior signal integrity over short distances while maintaining cost-effectiveness. Direct Palo Alto Networks compatibility ensures plug-and-play installation without firmware or driver requirements. **Application Areas:** • Data center rack interconnections • Server-to-switch high-speed links • Storage area network (SAN) deployments • Network switch stacking • High-performance computing clusters • Cloud infrastructure buildouts **Installation & Maintenance:** Simple installation requires only direct connection between compatible QSFP28 ports. No external power or configuration needed. The durable plastic jacketing protects against environmental factors while maintaining flexibility for tight spaces. Recommended storage temperature: -40°C to 85°C. **Warranty & Support:** Backed by a 90-day limited warranty, with free standard shipping on orders over $99. Ships directly from our facilities in Danville, CA or Beaufort, SC for rapid delivery. As a direct replacement for Palo Alto Networks part number PAN-QSFP28-DAC-0.5M, this cable offers genuine performance and compatibility at exceptional value. Custom brand programming available for OEM and reseller requirements.