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IPC-6012 Class 2 vs Class 3 Selector
Match your 8-12 layer multilayer PCB to the right IPC-6012 performance class before you release fabrication data.
How to read this: pick the end-use environment closest to your product. The tool returns the class most fabricators
build to for that market, the specific acceptance criteria that change between classes, and the IPC-6012 addendum
(if any) your industry typically references. Treat it as a starting point for your spec review — not a substitute
for your own contract drawings.
Recommended performance class
—
| Acceptance criterion | Class 2 | Class 3 / 3A |
|---|---|---|
| Min. plated copper in hole wall | 20 µm | 25 µm |
| Annular ring / breakout | Breakout allowed (90° max) | No breakout permitted |
| Filled via — min. plating fill | ~50% (approx.) | ~75% (approx.) |
| Thermal-cycle / IST acceptance | Standard endurance | Higher IST cycle survival |
| Typical use intent | Functional, serviceable | Continuous / high-reliability |
PCBark builds 8-12 layer multilayer boards to both IPC-6012 Class 2 and Class 3. Hole-wall plating, annular-ring,
and via-fill figures shown are nominal acceptance thresholds from IPC-6012 and are approximate / verify with
PCBark against the current revision and your board’s specific drawing notes. This tool gives no pricing —
class selection affects yield and inspection, so cost is quoted per design.
