NVIDIA Mellanox MCP7H60-W003R26 400GbE QSFP-DD to 2x 200GbE QSFP56 Passive Copper Splitter Cable, 3m, 26AWG: This is a passive copper direct attach (DAC) splitter cable that breaks one 400GbE QSFP-DD port into two 200GbE QSFP56 connections. The total length is 3 meters with 26AWG copper conductors. This is a passive 1-to-2 breakout cable, not an active optical cable and not a 1-to-1 QSFP-DD straight cable. This is a refurbished unit.
Engineering Context
The MCP7H60-W003R26 uses 8x50G PAM4 lanes on the QSFP-DD end, splitting them into two QSFP56 ports each carrying 4x50G PAM4 lanes for 200Gb/s. As a passive copper assembly, it requires no power and adds zero latency from active electronics. 26AWG conductors balance reach and bend radius for top-of-rack deployments. Bit error rate is dependent on link FEC; the cable is rated for use with KP4 FEC enabled by default on supported switches and NICs. Insertion loss budget is consumed by the 3m run plus connector terminations.
Deployment & Use Cases
Top-of-Rack 400GbE QSFP-DD switch ports breaking out to two 200GbE servers in the same rack. Aggregating dual ConnectX-6 / ConnectX-7 200GbE adapters into a single high-radix switch port. Spine-to-leaf 200GbE links from a 400GbE QSFP-DD spine. Density-optimized cabling in AI/ML clusters where each compute node has 200GbE QSFP56.
Technical Specifications
- OEM: NVIDIA Mellanox
- Part Number: MCP7H60-W003R26
- Cable Type: Passive Copper DAC Splitter
- Connector A: QSFP-DD (8x50G PAM4)
- Connector B: 2x QSFP56 (4x50G PAM4 each)
- Aggregate Data Rate: 400GbE breaking to 2x 200GbE
- Length: 3 meters
- Conductor Gauge: 26AWG
- Power: Passive (no power draw)
- FEC: KP4 FEC required on supported equipment
- Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Requires a switch port that supports QSFP-DD breakout to 2x 200GbE QSFP56 (e.g., NVIDIA Quantum-2 / Spectrum-3 platforms with breakout firmware enabled). Not compatible with 4x100GbE breakout configurations on the QSFP-DD side without different cable SKU. Both QSFP56 endpoints must be 200GbE-capable; this cable does not work as a 1-to-1 QSFP-DD straight cable. Passive copper at 3m with 26AWG; reach is fixed and cannot be extended. KP4 FEC is required for reliable operation. Not suitable for runs longer than 3m — for longer reach, an active or AOC variant is required.
Frequently Asked Questions (FAQ)
Q. What is the MCP7H60-W003R26?
The MCP7H60-W003R26 is a 3m passive copper splitter DAC: one QSFP-DD head at 400GbE breaks out into two QSFP56 legs at 200GbE each.
Q. Does the switch need special configuration?
Yes. The head port must be configured for breakout mode.
Q. Will T.E.S IT-SOLUTIONS confirm the configuration of MCP7H60-W003R26 before shipping?
Yes. T.E.S IT-SOLUTIONS (tes-itsolutions.com) bench-tests each unit where test topology is available, before dispatch from EU stock.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests every DAC for connector integrity, lane continuity, and EEPROM identity before shipment. We provide expert consultation on high-speed Ethernet breakout cabling, global shipping, and 1–3 day handling. Visit tes-itsolutions.com for our full catalog.