NVIDIA Mellanox MCP7F00-A005 QSFP28 to 4xSFP28 100GbE Hybrid Breakout DAC, 5m, 26 AWG: This is a 5-meter passive copper hybrid breakout cable that splits a single QSFP28 100GbE port into four independent SFP28 25GbE links. This is a passive Direct Attach Copper assembly with no electronics, retimers, or DSPs. This is NOT an active optical cable, NOT a 1:1 QSFP28 cable, and NOT a fiber optic transceiver. Condition: New, factory-sealed.
Engineering Context
The MCP7F00-A005 is built on 26 AWG twinax conductors — a thicker gauge than the 30 AWG short-reach variants — to preserve signal integrity at the 5m reach. Aggregated bandwidth is 100Gb/s, lane structure is 4x25Gb/s NRZ, with each SFP28 leg presenting a single 25Gb/s lane. Power consumption is 0W on the cable itself; latency is bounded by physical propagation only, with no protocol-layer processing introduced by the cable.
Deployment & Use Cases
Cross-rack QSFP28 switch ports fanned out to four 25GbE servers, NICs, or storage targets where short reach DACs cannot span the distance. Spectrum SN2000/SN3000 switch port density expansion onto ConnectX-4 Lx, ConnectX-5 EN, or ConnectX-6 Dx 25GbE adapters in adjacent racks. Storage front-end aggregation for SAN and NAS controllers using SFP28 ports. Enterprise leaf-spine fabrics consolidating 25GbE endpoints into a 100GbE uplink across longer cable trays.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCP7F00-A005
Form Factor: QSFP28 to 4x SFP28 (Hybrid Breakout)
Cable Type: Passive Copper DAC (PCC Hybrid)
Data Rate: 100GbE aggregated / 4x 25GbE per leg
Lane Configuration: 4 lanes x 25Gb/s NRZ
Length: 5m
Wire Gauge: 26 AWG
Power: 0W (passive)
Condition: New, factory-sealed
Compatibility & Hard Constraints
Compatible with NVIDIA Mellanox Spectrum Ethernet switches with QSFP28 ports configured for 4x25GbE breakout, and with ConnectX-4 Lx, ConnectX-5, and ConnectX-6 Dx adapters supporting SFP28 25GbE. The QSFP28 host port must be explicitly configured for breakout / fan-out mode. Not for 1:1 QSFP28-to-QSFP28 100GbE links. Not an InfiniBand cable. Not for 200GbE, 400GbE, or 50G PAM4 lanes. The 26 AWG construction is stiffer and heavier than 30 AWG short-reach DACs — plan rack pathways accordingly. Fixed 5m length.
Frequently Asked Questions (FAQ)
Q. What is the MCP7F00-A005?
The MCP7F00-A005 is a 5m passive copper breakout cable: one QSFP28 head at 100GbE breaks out into four SFP28 legs at 25GbE each.
Q. Does the switch need special configuration?
Yes. The head port must be configured for 4x25GbE breakout mode.
Q. Will T.E.S IT-SOLUTIONS confirm the configuration of MCP7F00-A005 before shipping?
Yes. T.E.S IT-SOLUTIONS (tes-itsolutions.com) inspects each unit and verifies vendor markings before dispatch from EU stock.

Why Choose T.E.S IT-SOLUTIONS
Every new MCP7F00-A005 ships sealed and is verified by T.E.S IT-SOLUTIONS against the NVIDIA P/N before dispatch. Handling time 1-3 business days, secure international shipping, and expert support on Spectrum and ConnectX 25GbE deployments.