NVIDIA Mellanox MCP7F60-W003R26 400GbE QSFP-DD to 4x100GbE QSFP56 Splitter Cable, 3m, 26AWG: This is a 3-meter passive copper Direct Attach Breakout Cable (DAC) that splits a single QSFP-DD 400GbE port into four independent 100GbE QSFP56 connections. The cable uses 26AWG twinaxial copper. This is a passive cable; it is NOT an active copper cable or an AOC and contains no signal-conditioning electronics. This is a refurbished unit.
Engineering Context
The MCP7F60-W003R26 lets a single 400GbE switch port serve four 100GbE endpoints, halving the cabling and switch port count for fan-out designs. 400GbE QSFP-DD uses 8 lanes of 50Gb/s PAM4; each QSFP56 leg carries 2 lanes of 50Gb/s PAM4 for 100Gb/s. RS-FEC (RS(544,514)) is required end-to-end on PAM4 links. The 26AWG conductor improves reach margin compared to 30AWG at 3m. Passive copper draws essentially zero port power, an advantage at fabric scale.
Deployment & Use Cases
Spine-to-leaf fan-out from a Spectrum-3 SN4000-series 400GbE switch port to four 100GbE leaf endpoints. ConnectX-7 to legacy ConnectX-5/6 100GbE adapter migration paths. AI/HPC training cluster east-west traffic where 4 nodes share one switch port. Storage aggregation where one 400GbE uplink fans out to 100GbE storage targets.
Technical Specifications
- OEM: NVIDIA Mellanox
- Part Number: MCP7F60-W003R26
- Form Factor: QSFP-DD to 4x QSFP56
- Data Rate: 400GbE to 4x 100GbE
- Cable Type: Passive Copper Breakout (DAC)
- Length: 3m
- Conductor Gauge: 26 AWG
- Protocol: 400GbE / 100GbE Ethernet
- Standard: IEEE 802.3bs / 802.3cd, RS-FEC (RS(544,514)) required for PAM4
- Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with NVIDIA Spectrum-3 SN4000-series 400GbE switches and ConnectX-7 adapters on the QSFP-DD end, and with QSFP56 100GbE ports on Spectrum-2/Spectrum-3 switches and ConnectX-6/ConnectX-7 adapters on the breakout legs. Requires the switch port to be configured for 4x100GbE breakout mode. Not compatible with QSFP28-only 100GbE ports without a separate adapter; QSFP56 to QSFP28 is electrically distinct (PAM4 vs NRZ). Not designed for InfiniBand fabrics. Fixed 3m length; cannot be reconfigured to a different breakout ratio.
Frequently Asked Questions (FAQ)
Q. What is the Data Rate of the MCP7F60-W003R26?
The data rate of the MCP7F60-W003R26 is 400GbE.
Q. Is the MCP7F60-W003R26 supplied new or refurbished, and who supplies it?
The MCP7F60-W003R26 is supplied refurbished by T.E.S IT-SOLUTIONS, lab-tested before dispatch and shipped from EU stock with 1-3 business day handling. Full listing and current pricing at tes-itsolutions.com.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests every refurbished breakout cable for connector retention, conductor continuity, and EEPROM readout on all four legs before shipment. We offer expert consultation on 400GbE fan-out design, global shipping, 1-3 day handling, and comprehensive warranty.