The JBX05337 0.5m 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents a reliable, cost-effective solution for high-speed data center networking. This professionally manufactured cable meets stringent industry standards and delivers consistent performance in demanding enterprise environments. **Technical Specifications:** This passive direct attach copper (DAC) cable features 30AWG twinax construction, delivering 40GB data transmission rates compliant with IEEE 802.3ba and SFF-8436 standards. The QSFP+ connectors are specifically designed for Intel-compatible networking equipment, ensuring broad compatibility with enterprise infrastructure. Dimensions of 12x12x2mm provide a compact form factor suitable for dense networking environments. **Performance & Reliability:** Passive DAC technology eliminates active signal regeneration, resulting in lower power consumption, reduced heat generation, and minimal latency. Operating across a wide temperature range of 0 to 70°C (32 to 158°F), this cable maintains consistent performance in both climate-controlled data centers and variable environments. **Compliance & Safety:** RoHS, TUV, and UL certifications ensure compliance with environmental regulations (EU directive 2002/95/EC) and international safety standards. The cable is manufactured in Vietnam and China using quality-controlled processes. **Ideal Applications:** Perfect for connecting high-speed network switches, server NICs, and storage systems in data centers, cloud infrastructure, and enterprise networks. The 0.5m length is ideal for rack-mounted equipment with close proximity connections. **Value & Support:** Includes a 90-day limited warranty and qualifies for free standard shipping on orders exceeding $99. Ships from strategically located U.S. warehouses (Danville, CA and Beaufort, SC) for rapid delivery. Custom brand programming is available for bulk orders. **Compatible Replacements:** This cable replaces OEM part numbers XLDACBL050CM and CBL1-0600H30, offering a more economical alternative without sacrificing quality or performance.