NVIDIA Mellanox MCP7H00-G005 100GbE to 2x50GbE Passive Copper Hybrid Breakout Cable, 5m: This is a 5-meter passive copper hybrid breakout cable that splits a single 100GbE QSFP28 port into two independent 50GbE QSFP28 links. The Y-shaped assembly has one QSFP28 connector on the switch side and two QSFP28 connectors on the destination side. This is a fixed-length integrated assembly, not a transceiver with a detachable patch cord. This is a new (factory-sealed) unit.
Engineering Context
The MCP7H00-G005 uses 26 AWG twinax copper and carries 100Gb/s aggregate (4x25Gb/s NRZ) split into two 50GbE (2x25Gb/s NRZ) links. At 5m the cable approaches the upper end of practical passive copper reach for 25G NRZ lanes, so signal margin and FEC headroom matter — link partners must negotiate and apply RS-FEC (CL91) per IEEE 802.3 for stable 50GbE operation. The cable is fully passive with zero power draw.
Deployment & Use Cases
Inter-rack connections where a single 100GbE QSFP28 port aggregates two adjacent-rack 50GbE endpoints. Connecting NVIDIA Spectrum SN2700 or SN3700 switches to ConnectX-5 EN servers across mid-row spans. HPC head-node fan-out at distances beyond a single rack. Storage cluster attachment where 50GbE per node is sufficient and switch ports are scarce.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCP7H00-G005
OEM Variant Code: MCP7H00-G005R26L
Form Factor: 1x QSFP28 to 2x QSFP28 (Hybrid Breakout)
Data Rate: 100GbE → 2x 50GbE (4x25Gb/s NRZ split 2+2)
Cable Type: Passive Copper Hybrid Breakout
Length: 5m
Cable Gauge: 26 AWG
Protocol: 100GbE / 50GbE Ethernet
Power Draw: Passive (0W)
Condition: New — Factory-sealed, distributed by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with NVIDIA Spectrum SN2700, SN3700, and equivalent 100GbE QSFP28 switches with 50GbE breakout support. Compatible with ConnectX-5 EN and ConnectX-6 Dx in 50GbE single-lane mode (2x25G NRZ). RS-FEC (CL91) MUST be enabled at both ends for stable 50GbE operation at this length. The 100GbE port must be configured for breakout in switch software. Not compatible with switches lacking 50GbE breakout firmware. Not compatible with 200GbE PAM4 endpoints. Not a transceiver-and-patch-cord assembly; 5m and Y topology are fixed.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS verifies all three connectors, lane continuity, and Y-junction integrity on every hybrid cable before shipment. We provide expert consultation on 100GbE/50GbE breakout topologies, global shipping with 1–3 day handling, and dedicated post-sales support. Visit https://www.tes-itsolutions.com for warranty terms and the full catalogue.