.PRJMBD File Extension
Altium Designer Multi-board Project
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What is a PRJMBD file?
A PRJMBD file is a multi-board project created by Altium Designer, a CAD application used by engineers to design PCBs. It contains multiple Printed Circuit Board (PCB) design documents and includes layouts of PCB electrical components. PRJMBD files also store project settings and sub-project links for creating a product with multiple interconnected PCBs
The PRJMBD file type is a native project format only associated with Altium Designer. The format enables users to save multiple PCBs as one assembly, which includes the ability to add .PRJPCB files to a PRJMBD file with Altium Designer.
Other native project file types supported by Altium Designer include the following:
How to open a PRJMBD file
You can only open PRJMBD files with Altium Designer. To open a PRJMBD file with Altium Designer, select File → Open Project.