Understanding PCB Mounting Holes

PCB mounting holes are drilled openings that allow you to securely attach the board to a chassis or enclosure. These holes, usually larger in size, are strategically placed at corners or critical points on the board. They are surrounded by copper pads or annular rings to ensure a stable connection with the mounting hardware.

Types of Mounting Holes

There are two main types of mounting holes: plated and un-plated. Plated holes are crucial for creating electrical connections between different PCB layers, while un-plated holes are used solely for mechanical support.

Benefits of Vias Surrounding Mounting Holes

Many mounting holes are encircled by small vias, which serve multiple purposes:

• Distribute mechanical stress to prevent damage over time
• Establish grounding connections for electromagnetic shielding
• Aid in heat dissipation by connecting to a copper plane or heatsink

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