NVIDIA Mellanox MCP7H60-W003R26 400GbE QSFP-DD to 2x200GbE QSFP56 Splitter DAC, 3m 26AWG: This is a 3-meter passive copper splitter cable that breaks one 400GbE QSFP-DD port out into two 200GbE QSFP56 ports. The cable uses 26AWG twinax copper conductors. This IS a 1-to-2 splitter; this is NOT a straight QSFP-DD-to-QSFP-DD 400GbE cable. This is a New unit.
Engineering Context
The MCP7H60-W003R26 carries 8 lanes at 50Gb/s PAM4 on the QSFP-DD end and splits them into two 4-lane QSFP56 200Gb/s connections. At 3 meters and 26AWG, the cable falls within passive copper reach for 50G PAM4 lanes when paired with switches and adapters supporting compliant FEC. Splitter cables enable port-density consolidation: a single 400GbE switch port can host two 200GbE servers without active optics. Twinax copper provides the lowest latency interconnect option at this distance.
Deployment & Use Cases
Top-of-Rack consolidation: connecting a 400GbE Spectrum-3 SN4000 switch port to two 200GbE ConnectX-6 servers. AI training pods where one switch port serves two 200GbE GPU nodes. High-density storage interconnect from 400GbE aggregation switches to 200GbE storage controllers. Hyperscale leaf-tier port consolidation to maximize 400G switch radix.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number (MPN): MCP7H60-W003R26
Form Factor: QSFP-DD to 2x QSFP56 (Splitter)
Data Rate: 400GbE → 2x 200GbE (8x 50Gb/s PAM4)
Cable Type: Passive Direct Attach Copper (DAC), Twinax
Length: 3m
Conductor Gauge: 26 AWG
Protocol: 400GbE Ethernet split to 2x 200GbE
Power: Passive (zero power consumption)
Condition: New — Sealed by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with NVIDIA Spectrum-3 SN4000 series 400GbE switches on the QSFP-DD end and ConnectX-6 200GbE adapters on the QSFP56 ends. Requires the host switch to support 2x200GbE breakout configuration on the QSFP-DD port. Not compatible as a straight 400G-to-400G cable. Not compatible with InfiniBand fabrics. Not compatible with passive 100Gb/s NRZ ports. 26AWG passive limits this to short-reach in-rack deployments only.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS verifies every splitter DAC for connector seating, lane continuity, and FEC alignment before shipment. Visit tes-itsolutions.com for 1–3 business day handling, global shipping, and consultation on 400GbE breakout topologies.