400G OSFP InfiniBand NDR DAC Twinax Cable, Passive, OSFP to OSFP, 28/30AWG, Flat Top
This 400Gbps Direct Attach Copper (DAC) cable from NVIDIA/Mellanox is designed for high-performance InfiniBand NDR systems. It features twin-port OSFP connectors on both ends and utilizes the Octal Small Form-Factor Pluggable (OSFP) interface with four high-speed copper pairs, each supporting data rates up to 100Gbps.
The cable complies with the OSFP Multi-Source Agreement (MSA) and IEEE 802.3cd standards, ensuring interoperability and reliability in demanding data center environments.
DAC cables provide ultra-low latency and are widely used to connect servers and GPU compute nodes to Top-of-Rack (ToR) switches, as well as for short-distance connections between spine and super-spine switches. They are also deployed in InfiniBand storage fabrics connecting HDD and flash memory systems.
With a flat-top (OSFP-RHS) form factor and passive twinax design, this cable offers a cost-effective, power-efficient, and low-latency solution for high-speed interconnects. Its minimal component count enhances system bandwidth, port density, and configurability while minimizing power consumption in supercomputing and hyperscale infrastructure.
Technical Specifications – 400G OSFP InfiniBand DAC Cable
• Form Factor: OSFP (Flat Top) to OSFP (Flat Top)
• Max Data Rate: 400Gbps
• Media: Copper
• Cable Type: Passive Twinax
• Wire Gauge: 28 AWG
• Minimum Bend Radius: 40.5 mm
• Power Consumption: 0.1W
• Jacket Material: PVC (OFNR rated)
• Operating Temperature: 0 to 70°C
• Protocols Supported: OSFP MSA, CMIS Rev. 4.0, IEEE 802.3cd
• Modulation Format: PAM4
• Warranty: 5 years