NVIDIA Mellanox MCP7H50-V002 Passive Copper Hybrid Splitter Cable, 200GbE QSFP56 to 2 × 100GbE QSFP56, 2m, 26 AWG: This is a passive direct-attach copper (DAC) breakout cable that splits a single 200Gb/s QSFP56 port into two 100Gb/s QSFP56 connections over a 2-meter, 26-AWG copper assembly. This is a passive cable (no powered electronics, no DSP, no FEC offload), it is not an active or optical assembly, and it is not a 1:1 200G-to-200G cable. This is a refurbished unit.
Engineering Context
The 200Gb/s end runs 4 × 50G PAM4 lanes; the cable internally splits those lanes into two 2 × 50G PAM4 (100Gb/s) sub-links. Passive copper at 26 AWG is reliable for short reach (≤ 3m typical for 200Gb/s PAM4); 2m is well within spec. The cable contributes near-zero latency (electrical propagation only) and zero power draw, since it carries no transceiver electronics. Colored pulltabs make the two 100GbE legs visually distinguishable in dense racks. As a breakout, it is one-to-many — a 1:1 200G-to-200G link requires a different cable.
Deployment & Use Cases
Top-of-Rack switches with 200GbE QSFP56 ports fanning out to servers with 100GbE QSFP56 NICs (e.g., ConnectX-6 single-port). Spine port consolidation where one 200GbE switch port serves two 100GbE leaf uplinks. Storage clusters mixing newer 200GbE switches with installed 100GbE storage controllers. Lab benches validating PAM4-era host bring-up. Power-constrained racks where every saved watt counts and active cabling is undesirable.
Technical Specifications
- OEM: NVIDIA Mellanox
- Part Number: MCP7H50-V002
- Form Factor: 1 × QSFP56 to 2 × QSFP56 (Y-split breakout)
- Cable Type: Passive direct-attach copper (DAC)
- Aggregate Data Rate: 200Gb/s split into 2 × 100Gb/s
- Signaling: 50G PAM4 per lane (4 lanes on 200G end, 2 lanes per 100G leg)
- Length: 2 meters
- Wire Gauge: 26 AWG
- Pulltabs: Colored for leg identification
- Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with NVIDIA Spectrum-2 / Spectrum-3 Ethernet switches (SN3000, SN4000) supporting 200GbE QSFP56 with 2:1 breakout, paired with ConnectX-6 / ConnectX-6 Dx or ConnectX-7 NICs at the 100GbE end. The switch port MUST be configured for 2 × 100GbE breakout in switch firmware before the link will train. Not compatible with QSFP28-only ports (the 200G end is QSFP56). Not compatible with 200Gb/s HDR InfiniBand at the breakout side unless the switch explicitly supports IB HDR100 breakout. Cannot be used as a 1:1 200G-to-200G cable. As a passive cable, no FEC mode is selectable on the cable itself — FEC is governed by the link partners.
Frequently Asked Questions (FAQ)
Q. What is the MCP7H50-V002?
The MCP7H50-V002 is a 2m passive copper splitter DAC: one QSFP56 head at 200GbE breaks out into two legs at 100GbE 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 MCP7H50-V002 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
Every breakout DAC is tested for continuity on all lanes and verified end-to-end on a Spectrum/ConnectX bench before shipment. T.E.S IT-SOLUTIONS provides expert consultation on PAM4 fabric breakout topologies, global shipping, and 1–3 day order handling.