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.
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.