The JBX05491 3-Meter 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents a cost-effective, high-performance solution for enterprise data center networks requiring reliable 40GB connectivity. Designed with Palo Alto Networks compatibility in mind, this twinax cable meets the demanding specifications of modern networking infrastructure. **Technical Specifications:** This passive DAC cable features 30AWG Twinax copper conductors with plastic jacketing, providing optimal signal transmission over its 3-meter reach. It meets IEEE 802.3ba and SFF-8436 standards, ensuring compatibility with a wide range of enterprise-grade networking equipment. The QSFP+ to QSFP+ connector configuration supports 40GBASE-CR4 transmission standards, delivering consistent 40GB/s performance. **Compliance & Safety:** RoHS and EU directive 2002/95/EC certified, this cable meets stringent environmental and safety requirements. TUL and UL certifications guarantee quality and reliability in enterprise environments. The copper construction provides superior electrical properties compared to alternatives, reducing signal degradation. **Performance & Applications:** As a passive DAC, this cable eliminates power requirements while delivering exceptional performance for short-to-medium distance connections within data centers, server rooms, and network closets. It's ideal for connecting switches, routers, and high-speed servers in virtualized environments, storage area networks (SANs), and high-performance computing clusters. **Operational Benefits:** Operating reliably across temperatures from 0-70°C (32-158°F), this cable performs consistently in various data center environments. The 3-meter length provides flexibility for standard rack configurations without excessive slack. Custom brand programming is available for organizations requiring OEM labeling. **Warranty & Support:** Backed by a 90-day limited warranty, this product ships from convenient US locations (Danville, CA and Beaufort, SC) with free standard shipping on orders over $99. Replaces Palo Alto Networks OEM part number PAN-QSFP-CU-3M, ensuring seamless upgrades and replacements.