The JBX05814 0.5m Cisco-Compatible 100GBASE-CR4 QSFP28 Passive DAC Cable represents an excellent solution for organizations seeking high-speed, cost-effective network connectivity without compromising on quality or performance. **Key Features & Specifications:** This passive direct attach copper cable operates at 100GB speeds, making it suitable for next-generation data center architectures. The 0.5-meter length is ideal for short-reach connections between adjacent network equipment, eliminating unnecessary cable slack while maintaining signal integrity. The 30AWG twinax construction provides optimal impedance matching and reliable high-speed transmission over the cable's compact span. **Technical Excellence:** Manufactured to IEEE 802.3bj and QSFP28 MSA standards, this cable ensures compatibility with Cisco and other leading networking platforms. It qualifies for IEEE 802.3bj specifications and meets stringent safety certifications including RoHS, TUV, and UL standards. The cable operates reliably across a wide temperature range (0-70°C), supporting demanding data center environments. **Compatibility & Replacement Value:** Direct replacement for Cisco OEM part numbers QSFP-100G-CU0-5M and MA-CBL-100G-50CM, this cable integrates seamlessly into existing Cisco infrastructure. The QSFP28-to-QSFP28 connector configuration provides universal compatibility with 100GB switching equipment. **Advantages of Passive DAC Technology:** Unlike active cables, this passive design consumes no power, reduces heat generation, and minimizes potential failure points. It delivers immediate functionality without requiring external power sources or active circuitry, making it more reliable and cost-effective for short-distance applications. **Compliance & Warranty:** Fully RoHS and ELV compliant, meeting EU Directive 2002/95/EC requirements. Backed by a 90-day limited warranty and rapid shipping from multiple US locations (Danville, CA and Beaufort, SC), ensuring quick delivery when you need it most.