Direct answer
First verify the exact MPN’s lifecycle status with manufacturer information. Then separate exact-part procurement from alternative-part evaluation. Establish acceptable evidence, date-code and inspection conditions before considering an offered older lot. An online listing is not proof that the product is available or suitable.
Why this issue arises
A series can contain active, discontinued and not-recommended-for-new-design parts. A reseller’s out-of-stock status is a different issue from a manufacturer discontinuance. Older offered material also raises procurement questions about identity, storage, solderability and packaging that a matching MPN cannot answer alone.
Practical review checklist
Verify the status
Record the complete MPN, manufacturer notice, notice date and any relevant last-order or last-shipment terms. Check for superseding information.
Define the exact-part route
State required quantity, acceptable date codes, packaging and available storage or source evidence. Record gaps rather than assuming traceability.
Define an alternative route
Compare technology, electrical limits, case, land pattern, derating and reliability requirements; assign an engineering approver.
Agree inspection before purchase
Select any third-party provider, sampling, methods, cost and acceptance criteria before accepting an offer. Avoid treating one sample result as proof for an entire lot.
Control production changes
Release an approved substitute through the customer’s BOM process. Keep unapproved market candidates separate from production-approved parts.
Illustrative example — not a customer case
An illustrative NRND notice is a design-adoption warning, not automatically a statement that an offered lot is counterfeit or that production has already stopped. Read the manufacturer’s exact wording and affected-MPN list.
Technical boundaries
This site does not confirm remaining worldwide stock, a last-time-buy opportunity or the authenticity of aged material. Lifecycle notices and quoted availability must be checked again when a real purchase is considered.
How TantalumCore can support
TantalumCore can research specified obsolete requirements, request obtainable evidence and organize alternative comparisons. No source or successful procurement is guaranteed by this guide.
Services →Request a Quote ↗Customer / engineering confirmation required
Manually verify the exact lifecycle notice, lot history, inspection requirements and engineering approval before committing a critical production schedule.
Manufacturer sources & scope
Sources checked: 2026-10-28. Editorial procurement guidance. Component limits come from the cited manufacturer documents. Customer engineering remains responsible for application validation.