IPC Class 2 vs Class 3: PCB Quality Standards Explained

IPC standards define the acceptability of printed circuit boards. Knowing the difference between Class 2 and Class 3 helps you specify the right quality level — and avoid paying for more than you need.

Class 2 — dedicated service

Suitable for most industrial, consumer and commercial electronics where continued performance is needed but occasional downtime is acceptable.

Class 3 — high reliability

Required where failure is not an option — medical, aerospace, automotive safety and critical industrial systems. Tighter tolerances on annular ring, plating and inspection.

Specifying it correctly

State the class on your fabrication notes and confirm your manufacturer can build and inspect to it. Chetumax Sales builds to IPC Class 2 and Class 3 with full inspection.