NVIDIA Mellanox MCP7F00-A002 QSFP28 to 4xSFP28 100GbE Hybrid Breakout DAC, 2m, 30 AWG: This is a 2-meter passive copper hybrid breakout cable that splits a single QSFP28 100GbE port into four independent SFP28 25GbE links. NVIDIA P/N 980-9I488-00C002. 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: Refurbished — tested by T.E.S IT-SOLUTIONS.
Engineering Context
The MCP7F00-A002 is built on 30 AWG twinax conductors and operates as a pure electrical signal path. Aggregated bandwidth is 100Gb/s, lane structure is 4x25Gb/s NRZ (CR4 to CR1), with each SFP28 leg presenting a single 25Gb/s lane. Power consumption is 0W on the cable itself; only the host ports draw power. Latency is bounded by physical propagation only — typically a few nanoseconds per meter — with no protocol-layer processing introduced by the cable.
Deployment & Use Cases
Top-of-Rack QSFP28 switch ports fanned out to four 25GbE servers, NICs, or storage targets within the same rack. Spectrum SN2000/SN3000 switch port density expansion onto ConnectX-4 Lx, ConnectX-5 EN, or ConnectX-6 Dx 25GbE adapters. Storage front-end aggregation for SAN and NAS controllers using SFP28 ports. Enterprise leaf-spine fabrics consolidating 25GbE endpoints into a 100GbE uplink trunk over short, in-rack runs.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCP7F00-A002 (NVIDIA P/N 980-9I488-00C002)
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 (CR4 to CR1)
Length: 2m
Wire Gauge: 30 AWG
Power: 0W (passive)
Condition: Refurbished — tested by T.E.S IT-SOLUTIONS
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; the cable cannot force this on its own. Not for 1:1 QSFP28-to-QSFP28 100GbE links. Not an InfiniBand cable. Not for 200GbE, 400GbE, or 50G PAM4 lanes. Fixed 2m length.
Why Choose T.E.S IT-SOLUTIONS
Every breakout DAC is bench-tested for lane integrity, branch continuity, and connector retention before shipment. T.E.S IT-SOLUTIONS handles units in 1-3 business days with secure international shipping and expert support on Spectrum and ConnectX deployments.