The JBX05676 4-meter 100GBASE-CR4 QSFP28 passive direct attach copper cable represents a cost-effective, high-performance solution for enterprise networking infrastructure. Designed with HPE compatibility at its core, this cable seamlessly integrates into existing data center environments while delivering exceptional reliability and performance. **Technical Specifications:** This passive DAC cable features 26AWG twinax copper conductors encased in durable plastic jacketing, ensuring optimal signal transmission over its 4-meter length. Dual QSFP28 connectors provide secure connections with consistent impedance matching. The cable operates reliably within a 0-70°C temperature range, accommodating both standard and elevated data center environments. **Performance & Compatibility:** Qualified to IEEE 802.3bj specifications and QSFP28 MSA standards, the JBX05676 guarantees compatibility with HPE networking equipment and infrastructure. The passive design eliminates the need for power consumption, reducing operational costs and heat generation—critical advantages in high-density data center deployments. This cable effectively replaces HPE part numbers 834973-B25-4M, R1N68A-4M, and 845406-B21-4M. **Compliance & Safety:** Full RoHS and ELV compliance ensures environmental responsibility and regulatory adherence. TUV and UL certifications validate safety standards across manufacturing and operation. Custom brand programming is available for organizations requiring OEM-specific labeling. **Application Benefits:** Ideal for connecting high-speed switches, servers, and storage arrays in enterprise data centers, this cable minimizes latency while maintaining signal integrity. The 4-meter length accommodates typical rack-to-rack deployments without excessive slack. Lower costs compared to active cables make it perfect for large-scale infrastructure projects. **Quality Assurance:** Manufactured in Vietnam and China to stringent quality standards, the cable undergoes rigorous testing before shipment. Backed by a 90-day limited warranty, with convenient availability from multiple U.S. distribution centers. Free standard shipping on orders exceeding $99 makes bulk purchases economical.