IPC-A-610: Specifying PCBA Acceptance Class in China POs
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IPC-A-610 (current revision H) is the acceptability standard for electronic assemblies, defining Class 1/2/3 quality levels, BGA void limits, and the common SMT defect categories inspectors actually grade against. When you source PCBA from China, naming the class — Class 2 for most products, Class 3 for high-reliability — in the PO is what separates a clear pass/fail from an argument over a tombstoned part. We grade incoming assemblies against the IPC-A-610 class you specify.
IPC-A-610 is the visual acceptance standard for finished electronic assemblies. The pitfall is leaving the class unstated, since a factory will default to its own (often loose) interpretation — so we write 'IPC-A-610H Class 2/3' into the PO and reference it at AOI and final inspection.
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FAQ
What is the difference between IPC-A-610 Class 2 and Class 3?
Class 2 is dedicated service electronics where continued function is desired. Class 3 is high-reliability hardware where failure cannot be tolerated, with tighter limits on solder fillets, BGA voiding, and lifted leads.
Can I require IPC-A-610 inspection from a Chinese factory?
Yes. Reputable PCBA factories work to IPC-A-610 routinely and can provide AOI and X-ray reports against it. State the revision (H) and class in the PO so there is no ambiguity at acceptance.
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