Description

Radxa Rock 3A M.2 to Mini PCIe Breakout Board

This is a small breakout board that adds a Mini PCIe slot to the Radxa Rock 3A SBC, which only exposes M.2 Key E and Key M connectors natively. The board plugs into the M.2 Key M slot and routes the signals to a standard Mini PCIe connector, making it compatible with the wide range of AP-grade Wi-Fi cards available in that form factor. All discrete passive components are 0603. Optional 0Ω resistors are provided for routing 3.3V to custom Mini PCIe pins depending on the card used. The Radxa Rock 3A's dedicated 3.3V rail can supply up to 4A, which is sufficient even for cards with RF power amplifiers.

The PCB must be manufactured at 0.8 mm thickness

Code

https://github.com/serg987/misc-hardware/tree/master/radxa_3a_m2_to_mpcie_router

Schematic and Layout

schematics.PNG

CAD-Custom parts and enclosures

https://github.com/serg987/misc-hardware/tree/master/radxa_3a_m2_to_mpcie_router

Download Gerbers Download BOM(Bill of materials)

May 31,2026

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Radxa Rock 3A M.2 to Mini PCIe Breakout Board

Breakout board adding a Mini PCIe slot to the Radxa Rock 3A, turning it into a travel router running mainline OpenWRT with dual Wi-Fi cards

Published: May 31,2026

Standard PCB

Download Gerber file 0

BOM(Bill of materials)

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Only PCB

PCB+Assembly

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