Mounting hole placement in PCB Design - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the primary purpose of mounting holes in PCB design?

Mounting holes are used to securely attach the PCB to its enclosure or chassis, preventing movement and mechanical stress.

beginner

Name two common types of mounting holes used in PCB design.

Common types include plated mounting holes (with metal plating for grounding) and non-plated mounting holes (just mechanical support).

intermediate

Why is it important to consider the placement of mounting holes relative to components?

To avoid interference with components and traces, ensuring mechanical stability without damaging electrical parts.

intermediate

What is a typical clearance recommendation around mounting holes?

A clearance of at least 1mm to 2mm around mounting holes is recommended to avoid electrical shorts and mechanical damage.

advanced

How can mounting holes contribute to grounding in PCB design?

Plated mounting holes can be connected to the ground plane, helping reduce electromagnetic interference and improve signal integrity.

What is the main function of mounting holes on a PCB?

A To store components

B To route electrical signals

C To cool down the PCB

D To attach the PCB securely to a case or chassis

Mounting holes are designed to fix the PCB mechanically, not for electrical or thermal functions.

Which type of mounting hole can help with grounding?

A Non-plated hole

B Thermal pad

C Plated hole

D Blind via

Plated mounting holes have metal plating that can connect to the ground plane.

What is a good clearance distance around mounting holes to avoid shorts?

A 1-2mm

B 0.5mm

C 0.1mm

D 5mm

A clearance of 1-2mm is typical to prevent electrical shorts and mechanical damage.

Why should mounting holes be placed away from components?

A To avoid mechanical interference and damage

B To increase signal speed

C To reduce manufacturing cost

D To improve soldering

Placing holes away from components prevents mechanical stress and interference.

Which of the following is NOT a purpose of mounting holes?

A Mechanical support

B Routing power signals

C Electrical grounding (if plated)

D Fixing PCB in enclosure

Mounting holes are not used for routing power signals.

Explain why mounting hole placement is important in PCB design.

Think about both mechanical and electrical aspects.

Describe the difference between plated and non-plated mounting holes and their uses.

Consider electrical connectivity and mechanical function.