NVIDIA Mellanox MCP7H00-G001 100GbE to 2x50GbE QSFP28 Hybrid Passive Copper Splitter Cable, 1m: This is a 1-meter passive copper hybrid breakout cable that splits a single 100GbE QSFP28 port into two independent 50GbE QSFP28 links. The assembly is a fixed direct-attach copper (DAC) splitter with one QSFP28 connector on the host side and two QSFP28 connectors on the device side. This is NOT a transceiver, NOT an active optical cable, and NOT a 4x25G fan-out to SFP28 ports. This unit is New.
Engineering Context
The MCP7H00-G001 uses 30 AWG twinaxial copper conductors and consumes effectively zero electrical power because it is fully passive (no retimer or DSP). The hybrid design carries each 50GbE link as 2 lanes of 25Gb/s NRZ over four differential pairs per QSFP28 connector. At 1m it is intended for in-rack splitting only — passive copper at 100G class is reach-limited. The cable provides full EMI immunity and contributes negligible cooling load to the switch.
Deployment & Use Cases
Splitting a single 100GbE switch port on Spectrum SN2000 / SN2700 / SN2410 into two 50GbE downlinks for ConnectX-4 Lx or ConnectX-5 dual-port servers. Compute density expansion in top-of-rack designs where 50GbE-attached servers are aggregated into a 100GbE leaf. HPC and AI cluster cabinets requiring 2:1 oversubscription topologies.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCP7H00-G001
Form Factor: 1x QSFP28 to 2x QSFP28 (Hybrid Splitter)
Data Rate: 100GbE to 2x 50GbE
Cable Type: Passive Copper DAC (Hybrid)
Wire Gauge: 30 AWG
Length: 1m
Protocol: Ethernet
Power: Passive (0W)
Condition: New — Sealed by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Compatible with NVIDIA Spectrum SN2000-series Ethernet switches that support 50GbE port modes and ConnectX-4 Lx / ConnectX-5 EN adapters running at 50GbE. The host QSFP28 port must be configured as a 2x50GbE splitter port. NOT a 4x25G breakout to SFP28 — both branch ends are QSFP28. NOT compatible with InfiniBand EDR splitting unless the switch firmware supports VPI hybrid mode. Length is fixed at 1m and cannot be extended.
Why TES
T.E.S IT-SOLUTIONS verifies every passive DAC for connector seating, conductor continuity, and EEPROM identity before shipment. We provide expert consultation on Ethernet breakout topologies, global shipping, and a 1–3 day handling time. Visit tes-itsolutions.com for the full catalog.