Product Change Notifications (PCN) are the alerts that decide whether your next quote ships on time or goes back to engineering. Miss one and a part you costed last week is unbuyable this week. Catch one early and you place a Last Time Buy before the window closes.
This guide explains what a PCN actually contains, why most EMS sourcing teams find out too late, and how to put PCN data inside the workflow where decisions are made.
We also cover what is new in CalcuQuote’s PCN add-on, including the recent addition of Accuris as a data source.
A Product Change Notification (PCN) is a formal notice from a component manufacturer indicating that something about a part is changing.
Common reasons a manufacturer issues a PCN include:
End of Life (EOL): the part will no longer be produced.
Form, fit, or function change: changes to specifications, package, or pinout.
Supplier change: a sub-component or fabrication site is moving.
Expiring exemption: a regulatory exemption (e.g., RoHS) is ending for that part.
Each PCN includes critical data points that describe the change and provide important details:
Alert Type: the category of change.
Alert Description: detailed explanation of what is changing.
Manufacturer Issue Date: when the notice was published.
Last Time Buy Date: the final order deadline.
Last Time Delivery Date: the last day stock ships.
Alert Number and Document URL: the official source document for verification.
Having access to the original PCN document is essential for credibility and effective escalation, rather than relying on informal sources like screenshots.
The usual signals are downstream:
By step 3, you are paying broker premiums or eating a redesign. The root cause is structural: PCN data lives in manufacturer portals, distributor emails, compliance databases, and analyst feeds. None of it lands inside the quoting tool where buyers actually make decisions.
The fix is not “check more portals.” The fix is moving PCN data into the workflow.
A practical PCN process has four checkpoints. Each one uses the same underlying data, surfaced at the right moment.
The moment a BOM lands, run it against PCN data. Any part with an active alert should show up immediately — with Alert Type, Description, and LTB date attached. This is the cheapest place to catch a problem. You have not quoted anything yet. Product change data is most valuable when surfaced directly inside the quoting process, helping sourcing teams identify risk before a quote is delivered.
In CalcuQuote, this is part of BOM Scrub.
A BOM that was clean at quote time may not be clean at order time. Continuous monitoring against PCN feeds catches changes that happen between quote and PO. The same data points apply — Alert Type, Description, LTB Date, LTD Date, Issue Date, Alert Number, Document URL.
In CalcuQuote, this is Material Health.
Buyers should see PCN status next to pricing and availability — before they commit to a part. If an MPN has an active EOL notice with an LTB date 30 days out, that fact belongs on the same screen as the price.
In CalcuQuote, this is built into Search.
For high-volume parts across your customer base, you want to know the moment a Product Change Notice or End-of-Life Notice posts. Not weekly, not monthly. As it happens.
In CalcuQuote, this is Monitoring.
A PCN feature is only as good as the data behind it. Two providers can report different alerts for the same part because their manufacturer relationships, ingestion pipelines, and document sourcing differ. Coverage gaps are silent — you do not know what you missed until it costs you.
The practical answer is multiple authoritative sources, cross-referenced, with the underlying document linked. Evidence-backed, not just notification-based.
CalcuQuote’s PCN add-on now includes Accuris as a data source — joining our existing official manufacturer feeds, expiring exemption alerts, and supplier change notifications.
For sourcing teams, this means:
Accuris data flows into the same four surfaces — BOM Scrub, BOM Health, Search, and Monitoring — using the same data points your team already works with. No new workflow. More signal.
Three or more “no” answers means PCN is currently a luck-based process at your shop.
PCNs are not paperwork. They are the earliest signal you get that a part you depend on is going away. Catch them early and you have options — LTB orders, alternates, customer conversations. Catch them late and you pay broker prices or redesign the assembly.
The PCN add-on is available for CalcuQuote customers on Quote Professional or Enterprise. With Accuris now included as a data source, the net is wider at the same point of decision.
See how CalcuQuote PCN works on your BOMs.