NVIDIA Mellanox MCP7H00-series cable, P/N MCP7H00-G03A 3.5m Passive Copper Hybrid Splitter Cable, 100GbE QSFP28 to 2x50GbE QSFP28: This is a 3.5 meters passive (un-amplified) direct-attach copper hybrid breakout cable that connects one 100GbE QSFP28 port to two independent 50GbE QSFP28 endpoints. It is not a 100GbE QSFP28-to-QSFP28 straight cable, a 4x25GbE QSFP28-to-4xSFP28 breakout, or an active optical cable. Sold as a new factory-sealed unit with NVIDIA P/N 980-9I39B-A5C03A.
Engineering context: The MCP7H00 family uses 26 AWG twin-axial copper conductors in a flat ribbon form factor and runs in passive NRZ mode at 25 Gb/s per lane. The single QSFP28 head carries four 25 Gb/s NRZ lanes (4x25G = 100GbE); the two split QSFP28 heads each carry two 25 Gb/s NRZ lanes (2x25G = 50GbE). Reach is matched to the 3.5m length; no retimer or DSP is present, so signal integrity depends on the host port's SerDes and FEC configuration.
Deployment and use cases: Top-of-rack to mid-rack 100GbE-to-2x50GbE aggregation in NVIDIA Mellanox Spectrum SN2000 and SN2700 series switches; ConnectX-4 and ConnectX-5 50GbE host adapters; leaf-spine designs that need to consolidate two 50GbE servers behind one 100GbE switch port; RDMA over Converged Ethernet (RoCEv2) fabrics; storage front-end aggregation in SAN/NAS deployments; HPC and AI cluster east-west links where 50GbE-per-host is the target.
Technical specifications:
Manufacturer Part Number (MPN): MCP7H00-G03A
NVIDIA P/N: 980-9I39B-A5C03A
Cable type: passive copper hybrid breakout (DAC), un-amplified
Connectors: 1x QSFP28 to 2x QSFP28
Data rate: 100GbE on the single end, 50GbE on each split end (NRZ, 25 Gb/s per lane)
Length: 3.5 meters
Conductor gauge: 26 AWG
Jacket / form factor: Green flat ribbon
Power: 0 W (passive cable)
Condition: New, factory-sealed
Compatibility and constraints: Validated by NVIDIA for Spectrum SN2000/SN2700 Ethernet switches and ConnectX-4/ConnectX-5 25/50/100GbE adapters in 100GbE-to-2x50GbE breakout mode. It will not negotiate as a 100GbE-to-100GbE straight cable, will not deliver 4x25GbE to SFP28 endpoints, and is not an InfiniBand EDR/HDR cable. Switch ports must be configured for breakout (split) mode and the host NIC must support 50GbE 2x25G NRZ. Third-party switch compatibility is not guaranteed; verify the part number against the vendor's qualified parts list before deployment.
Why TES: T.E.S IT-SOLUTIONS (tes-itsolutions.com) is a B2B reseller of NVIDIA Mellanox enterprise networking hardware. Each unit is verified against its NVIDIA part number and condition before dispatch. Standard handling time is 1–3 business days from order to shipment. For multi-unit lots, qualified parts list checks, or compatibility questions against your existing Spectrum/ConnectX deployment, contact our sales team before ordering.