100G QSFP28 to 4x 25G SFP28 passive breakout DAC cable
100G QSFP28 to 4x 25G SFP28 passive breakout DAC cable
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MCP7F00-A003 Mellanox Compatible, 100G QSFP28 to 4xSFP28 Passive Breakout DAC Cable - 3m

$125.00 USD

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Warranty: Lifetime

Mellanox Compatible 100G QSFP28 to 4xSFP28 Passive Breakout DAC Cable - 3 Meters

This third-party 100G QSFP28 to 4x25G SFP28 Passive Breakout DAC cable is fully compatible with Mellanox MCP7F00-A003, delivering reliable 100GbE to 4x25GbE connectivity for short-range high-speed networking applications up to 3 meters. Ideal for enterprise networking, AI/HPC clusters, top-of-rack (ToR) switching, and hyperscale data centers requiring low-latency breakout connectivity.

Built to QSFP28 MSA standards, it features QSFP28 to 4xSFP28 connectivity and pre-programmed EEPROM compatibility for seamless deployment with Mellanox/NVIDIA networking platforms. Backed by our lifetime warranty and rigorous testing—enjoy significant savings versus genuine Mellanox OEM cables while maintaining reliable, high-performance connectivity.

Key Features

  • Massive Cost Savings: Premium compatible breakout DAC cables at a fraction of OEM pricing—ideal for scaling enterprise and AI networking environments affordably.
  • Plug-and-Play Compatibility: Pre-programmed EEPROM enables seamless deployment with Mellanox/NVIDIA networking platforms.
  • 100G to 4x25G Breakout Connectivity: Supports high-density breakout configurations for switches, servers, and storage environments.
  • Low-Latency Passive Copper Design: Passive Twinax construction minimizes latency and power consumption.
  • Optimized for Data Centers: Ideal for top-of-rack switching, spine-leaf architectures, and high-throughput storage fabrics.
  • Reliable Short-Range Connectivity: Supports stable 100GbE to 4x25GbE transmission up to 3 meters.
  • Enhanced EMI Design: Designed to minimize electromagnetic interference in dense networking environments.

Technical Specifications

  • Data Rate: 100GbE to 4x25GbE
  • Cable Type: Passive DAC (Direct Attach Copper) Breakout Cable
  • Connector Type: QSFP28 to 4xSFP28
  • Cable Length: 3 Meters
  • Wire AWG: 28AWG Twinax
  • Input Voltage: 3.3V
  • Operating Temperature: 0°C to 70°C
  • Standards Compliance: QSFP28 MSA compliant
  • Compatibility: 100GbE breakout compliant

Compatibility

Programmed for compatibility with Mellanox/NVIDIA and MSA-compliant systems, including:

  • Mellanox/NVIDIA networking platforms
  • NVIDIA/Mellanox ConnectX adapters
  • Enterprise Ethernet networks
  • AI and HPC cluster environments
  • Top-of-rack (ToR) switching deployments
  • Hyperscale and cloud data center environments

Requires QSFP28 ports and compatible 25G SFP28 interfaces on connected devices.

Need different cable lengths, compatible DAC/AOC options, or bulk quotes? Contact us—we specialize in high-performance networking solutions for AI, HPC, and data center environments.

📋 View the full NVIDIA & Mellanox Interconnect Compatibility Guide for the complete tested model catalog.
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B
Ben Osei
100G to 4x25G breakout DAC — perfect for fan-out from 100G switches

We use the MCP7F00-A003 compatible 100G QSFP28 to 4xSFP28 breakout cable to fan out from our 100G spine switch ports to four 25G server ports. All four legs came up at 25G without any link training delay on our Arista and server NICs. Three meters is the right length for an adjacent rack. At $125 for a 100G to 4x25G breakout cable this is excellent pricing.

Thank you Ben! Four legs all up at 25G on first insertion from a 100G spine port is exactly the fan-out performance we test for. Great economics for server connectivity. Appreciate it!