The JBX05676 4m HPE-Compatible 100GBASE-CR4 QSFP28 Passive Direct Attach Copper Cable represents the ideal solution for organizations seeking cost-effective, high-performance interconnectivity in their data center infrastructure. This passive DAC cable combines proven copper twinax technology with rigorous engineering standards to deliver uncompromised 100GB Ethernet performance. Constructed with precision-engineered 26AWG twinax copper conductors surrounded by protective plastic jacketing, this cable provides exceptional signal integrity and durability in demanding environments. The passive design eliminates the need for power consumption, reducing operational costs while maintaining consistent performance across its full 4-meter length—ideal for standard rack-to-rack server connections and equipment interconnects. Fully qualified to IEEE 802.3bj specifications and QSFP28 Multi-Source Agreement (MSA) standards, this cable ensures universal compatibility with HPE networking equipment and other IEEE 802.3bj-compliant systems. The QSFP28 to QSFP28 copper connector configuration provides secure, reliable connections with minimal latency introduction. This cable is engineered to replace OEM part numbers 834973-B25-4M, R1N68A-4M, and 845406-B21-4M, making it an economical alternative for HPE infrastructure upgrades and expansions. Operating reliably in temperatures ranging from 0°C to 70°C (32°F to 158°F), it performs consistently whether deployed in climate-controlled data centers or environmentally variable settings. Compliance credentials include RoHS/ELV certification (EU Directive 2002/95/EC), TUV safety certification, and UL standards compliance, ensuring adherence to global environmental and safety regulations. Each cable is backed by a 90-day limited warranty, providing peace of mind for your network investment. With free standard shipping on orders exceeding $99 and availability from multiple U.S. fulfillment locations, procurement is simplified and economical. The JBX05676 is the preferred choice for IT professionals prioritizing reliability, performance, and value in high-speed data center networking solutions.