The JBX05814 100GBASE-CR4 QSFP28 passive DAC cable represents a cost-effective, high-performance solution for enterprise and data center networking infrastructure. With a 0.5-meter length optimized for short-reach applications, this cable delivers exceptional value without compromising on quality or reliability. **Technical Specifications:** This cable meets IEEE 802.3bj and QSFP28 MSA specifications, ensuring compatibility across a wide range of networking equipment. The 30AWG twinax copper construction provides optimal signal transmission characteristics while maintaining flexibility for installation in tight spaces. Operating temperature range of 0-70°C (32-158°F) supports standard data center environments. **Superior Compatibility:** Fully compatible with Cisco networking equipment, this cable directly replaces OEM part numbers QSFP-100G-CU0-5M and MA-CBL-100G-50CM. The QSFP28 form factor works seamlessly with 100 Gigabit Ethernet ports across major switch and server manufacturers. **Passive Technology Benefits:** Unlike active DAC cables, this passive design requires no external power, reducing overall system complexity and potential points of failure. The copper twinax construction delivers superior attenuation characteristics for reliable signal integrity at 100Gbps over short distances. **Compliance & Quality Assurance:** Fully RoHS and ELV compliant, meeting EU directive 2002/95/EC standards. TUV and UL safety certifications ensure product reliability and workplace safety. Every cable undergoes rigorous testing to guarantee consistent performance. **Ideal Applications:** Perfect for server-to-switch connections, storage array interconnects, and high-speed network backbone deployments where short-distance, high-bandwidth connectivity is essential. The 0.5m length is ideal for dense rack environments and blade server chassis. **Warranty & Support:** 90-day limited warranty provides peace of mind. Custom brand programming available for OEM partnerships. Ships from Danville, CA and Beaufort, SC locations with free standard shipping on qualifying orders.