Definition: PCB spacers and supports are mechanical components used to mount printed circuit boards (PCBs) securely within an enclosure, maintaining proper alignment, providing structural support, and ensuring electrical isolation.

Types

• Standoffs: Male-female or female-female threaded for screw-based mounting.
• Spacers: Unthreaded or threaded; maintain gap between boards or chassis.
• PCB Posts: Rigid pillars for stacking or elevating boards.
• Adhesive Supports: Snap-in or glue-in types for lightweight fixation.

Materials

• Metal: Brass, aluminum (conductive, strong).
• Plastic: Nylon, PEEK (insulating, lightweight).
• Stainless Steel: Corrosion-resistant, high strength.

Key Selection Criteria

• Board thickness and mounting hole size (e.g., #4-40, M3)
• Required height and load-bearing capacity
• Electrical insulation needs
• Environmental factors (temp, vibration, humidity)
• Assembly method (screw, press-fit, adhesive)

Note: Proper spacing prevents short circuits, reduces mechanical stress, and aids in heat dissipation and airflow.