NVIDIA Mellanox MCP7H00-G01A 100GbE Hybrid Splitter DAC, QSFP28 to 2x QSFP28, 1.5m: This is a passive Direct Attach Copper (DAC) splitter cable that converts a single 100Gb/s Ethernet QSFP28 port into two independent 50Gb/s Ethernet links. The cable terminates in one QSFP28 plug on the switch side and two QSFP28 plugs on the host side, with each downstream side carrying 2x 25G NRZ lanes. This is a passive electrical assembly with no transceivers, retimers, or active components. This is a new factory unit.
Engineering Context
The MCP7H00-G01A enables 1:2 port-density expansion at the ToR layer. A single 100GbE QSFP28 switch port serves two 50GbE end-hosts, doubling effective port count without adding switches. As a passive copper assembly with 30AWG conductors, it consumes 0W and introduces near-zero electrical latency. At 1.5m, it operates well within the passive copper reach budget for 25Gb/s NRZ per-lane signaling, and is fully EMI-shielded.
Deployment & Use Cases
50GbE breakout from 100GbE Spectrum ToR ports to ConnectX-4 Lx servers. High-density compute and storage racks where 50GbE per host is sufficient. Cost-optimized 100G-to-2x50G expansion in cloud and enterprise fabrics. In-rack reach typical of ToR-to-server runs.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCP7H00-G01A
Form Factor: QSFP28 to 2x QSFP28 (Hybrid Splitter)
Data Rate: 100GbE → 2x 50GbE
Cable Type: Passive Copper DAC
Length: 1.5m
Gauge: 30AWG
Modulation: NRZ (25Gb/s per lane)
Power Consumption: 0W (passive)
Condition: New
Compatibility & Constraints
Compatible with NVIDIA Spectrum SN2000 series 100GbE switches that support 50GbE breakout mode and ConnectX-4 Lx adapters configured for 50GbE. The switch port must be explicitly set to 2x 50G breakout. Not compatible with InfiniBand ports — this is an Ethernet-only hybrid. Not a 4x 25G splitter; downstream sides are 2x 50G (each leg carrying 2x 25G NRZ aggregated to 50Gb/s), not four independent 25G ports.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests every DAC for connector pin integrity, conductor continuity, and link-up at the rated speed before shipment. Our team provides expert consultation on Spectrum 100GbE breakout topologies, 1–3 day handling, and global shipping. Visit the product page for details and warranty information.