The JBX05492 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents a premium connectivity solution for high-speed networking infrastructure. This 3-meter twinax cable is engineered to meet the demanding requirements of modern data centers and enterprise network environments requiring 40GB Ethernet connectivity. **Key Features & Benefits:** This passive DAC cable eliminates external power requirements, offering a cost-effective solution compared to active alternatives while maintaining full 40GBASE-CR4 compliance. The 30AWG copper construction ensures superior signal integrity and minimal attenuation over the 3-meter span. Fully RoHS and ELV compliant, it meets stringent environmental and safety standards required in enterprise deployments. **Technical Specifications:** Form Factor: QSFP+ to QSFP+ Data Rate: 40GB Cable Length: 3 meters Gauge: 30AWG twinax Operating Temperature: 0-70°C (32-158°F) Compliance: IEEE 802.3ba, SFF-8436, RoHS, TUV, UL certified Country of Origin: Vietnam and China **Applications:** Ideal for interconnecting Ruckus switches, routers, and network appliances. Suitable for data center spine-and-leaf architectures, high-speed campus networks, and telecommunications equipment requiring low-latency, high-bandwidth connectivity. Compatible with OEM part numbers E40G-QSFP-C-0301 and E40G-QSFP-QSFP-P-0301. **Quality Assurance:** Backed by a 90-day limited warranty and custom brand programming available upon request. Ships from multiple U.S. locations (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99. This cable represents a reliable, cost-effective solution for organizations standardizing on Ruckus networking infrastructure while requiring certified, compliant connectivity solutions for mission-critical applications.