Discontinuation taken from Bourns' own Product Obsolescence Memos — Bourns-authored PDFs opened in full (the two September 2025 Riedon™ memos as TTI-hosted mirrors of the identical Bourns PDFs; the custom-magnetics memo on bourns.com itself). Every record is one entry of a memo's obsolete-part list, across 8 memos: N2552REV (711 records — Riedon thick film power, metal foil power, and high-power wirewound resistors: 167 with a named Bourns replacement, 544 in the memo's own no-replacement list), N2553REV (417 records — Riedon shunts, fuses, and fuseblocks: 352 with a named replacement, 65 with none), IC219954REV (96 records — custom magnetics, no replacements available), and T2510 (10 records — Trimpot® custom products, no direct replacements), plus IC24014 (255 records — magnetics, effective immediately February 2024, no replacements), ESD2424 (5 records — SMF4L TVS diodes, all with named replacements), SC2416 (3 records — EN encoders, immediate, no replacements) and FU2403 (1 record — TCS-DL004-750-WH, with a potential replacement named) — the exact part number, the recommended replacement exactly as the memo prints it where one is printed per part, and the memo's issue, last-time-buy and last-ship dates. 525 of the 1,498 records name a per-part replacement.
Time-critical, stated plainly: no window in this file is still open — the most recent deadlines are the Riedon memos' last time buy (27 February 2026) and last time ship (31 August 2026), both passed before compilation. The value is the verified migration cross-reference: 525 obsolete part numbers with a named Bourns replacement, and 973 part numbers Bourns states have no replacement.
Counting basis, stated plainly: one record per obsolete-part entry at the exact part number as printed (711 + 417 + 255 + 96 + 10 + 5 + 3 + 1 = 1,498); the PDFs' spreadsheet-attachment pages repeat the lists and are not double-counted, and two pairs that print twice in N2552REV (PF2205-10RF1, PF2205-150RF1) are counted once each.
Honesty notes: replacements are reproduced exactly as printed, paired by the memos' own two-column layout and spot-verified against the rendered pages. The no-replacement lists are plain part-number grids — no pairing is asserted for them. T2510 offers standard models only as a family-level potential alternative, recorded as no per-part replacement. One part prints as "PF2202-47Rf1" (lowercase f) and is reproduced exactly.
Verification standard: Bourns-authored memos only — the 4 memos above, each opened in full, with the paired tables parsed column-wise from the PDFs' text layer by a script that asserts the pairing shape row by row.
| Notice | Part to be Discontinued | Replacement Part | Last Time Buy | Last Ship |
|---|---|---|---|---|
| N2552REV | NHR2D-0R5F1 | PWR221T-50-R500F | 2026-02-27 | 2026-08-31 |
| N2553REV | MKA-100-10 | RSA-100-10 | 2026-02-27 | 2026-08-31 |
| N2552REV | PF2473-1K5J1 | None named | 2026-02-27 | 2026-08-31 |
| N2553REV | CNL-100 | None named | 2026-02-27 | 2026-08-31 |
| IC219954REV | TMS60149CT | None named | 2022-06-20 | 2022-12-20 |
| T2510 | 7914S-SY5-000E | None named | 2025-10-01 | 2025-12-01 |
Sample rows are copied verbatim from the paid dataset file (the paid file also carries the series / detail, the issue date and a source URL per record, grouped by notice).
Full file: all 1,498 discontinuance records from Bourns' 8 memos above, plus buyer notes and honesty notes. Clean Markdown, compiled 2026-10-22.
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Facts compiled from Bourns' published Product Obsolescence Memos (including memos for the Riedon™ lines Bourns acquired in April 2023); not affiliated with or endorsed by Bourns, Inc. Trademarks belong to their owners. Verify the current status of any specific part against the original notice before committing a design or a purchase order.