The 400G QSFP-DD Direct Attach Cable (DAC) delivers a high-performance, cost-efficient solution for ultra-short-reach 400-Gigabit Ethernet links. Designed for top-of-rack and adjacent-rack connections, this cable enables a stable QSFP-DD-to-QSFP-DD copper link without the need for optical transceivers—making it ideal for high-density data centers, AI clusters, cloud infrastructures, and hyperscale environments.
Built with ultra-low-loss materials, enhanced mechanical reinforcement, and precision-engineered twisted-pair conductors, the cable provides outstanding signal integrity and excellent bending performance. Each assembly is tested in real switching platforms to ensure the highest end-to-end reliability and compliance with IEEE and QSFP-DD MSA standards.
Key Features
• Hot-pluggable QSFP-DD form factor
• Supports data rates up to 425Gbps
• 8 × 53Gb/s PAM4 modulation
• Fully QSFP-DD MSA compliant
• Operating temperature: 0°C to +70°C
• 30AWG high-performance copper
• Cable lengths up to 3 meters
• Single 3.3V supply
• BER better than 1E-15
• LSZH (Low Smoke Zero Halogen) jacket
• Lead-free / halogen-free PCB
• SFF-8636 compliant
• I²C management interface
• Supports protocols: IEEE 802.3cd, QSFP-DD MSA, CMIS 4.0
• RoHS compliant
Applications
• 400G Ethernet interconnects
• High-density data centers
• AI/ML compute clusters
• Switch-to-switch and router-to-switch links
• Short-reach copper connections within racks or between adjacent racks