NVIDIA Mellanox MCP7H00-G002 100GbE to 2x50GbE QSFP28 to 2xQSFP28 Passive Hybrid Breakout DAC, 2m: This is a 2-meter passive copper hybrid breakout cable that splits a single QSFP28 100GbE port into two independent QSFP28 50GbE links. It is a fixed-length copper assembly with one QSFP28 head and two QSFP28 legs. This is not a 1:1 cable and not a 4-way breakout. This is a refurbished unit.
Engineering Context
The MCP7H00-G002 maps the four 25Gb/s NRZ lanes of the QSFP28 port to two QSFP28 cages, each carrying two 25Gb/s lanes for a 50GbE link per leg. This permits a single 100GbE switch port to fan out to two 50GbE endpoints. The cable is passive copper with 30 AWG conductors, drawing no power and adding negligible latency. The 2m length suits aggregation between adjacent racks or top-of-rack to mid-rack server placements.
Deployment & Use Cases
Spectrum SN2000/SN3000 100GbE switches breaking out to 50GbE-attached servers running ConnectX-4 or ConnectX-5 QSFP28 adapters configured at 50GbE. Aggregation of dual 50GbE storage controllers behind a single 100GbE leaf. Hyperconverged platforms standardized on 50GbE host networking with 100GbE uplinks.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCP7H00-G002
Form Factor: QSFP28 to 2xQSFP28 (Breakout)
Cable Type: Passive Direct Attach Copper Hybrid
Data Rate: 100GbE → 2x50GbE
Length: 2m
Conductor: 30 AWG
Jacket: PVC
Lane Mapping: 4x25G → 2x(2x25G NRZ)
Protocol: Ethernet (100GbE breakout / 2x50GbE)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Requires the QSFP28 switch port to be configured for 2x50G breakout mode; verify firmware support on the specific switch model. The QSFP28 legs must connect to adapters configured at 50GbE — link training at 100GbE on a leg will fail because only two lanes are available. Not compatible with 40GbE QSFP+ ports. This is a copper passive cable; reach beyond 2m requires an active or optical breakout. Fixed 2m length.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS link-tests each leg at 50GbE and verifies the QSFP28 head before shipment. Visit tes-itsolutions.com for global shipping with 1–3 day handling.