The third Bourns slice: 599 discontinued orderables from the three Bourns-authored Product Obsolescence Memos that shipped in neither Bourns v1 nor v2 — N2543REV (Select Riedon™ Custom Resistors, 515 records; revised September 15, 2025), SPD2602 (Select Surge Protection Devices, 55 records; May 29, 2026) and OSP2311 (Model 1965 Series 50 Ohm Coaxial Surge Protector, 29 records; March 31, 2023) — downloaded first-hand and opened in full (N2543REV and SPD2602 from bourns.com; OSP2311 from the DigiKey mirror of the identical Bourns PDF). No record names a replacement: each memo prints its own "no replacement part numbers are available" — shipped as printed. Zero overlap with Bourns v1 + v2 (asserted at build).
What is in the file: N2543REV = 515 Riedon custom resistor orderables across the CBR / CMF / HTE / HVC / RTDS / TF200x / TFC200x families. SPD2602 = 55 surge protection devices (1500 / 1530 / 1540 / 1810 / 1811 / 1821 / 1830 / 1840 series, CAT6/DATA/GB protectors, the 4040 test set and 7229x parts). OSP2311 = 29 Model 1965 coaxial surge protector orderables.
One discrepancy, disclosed: SPD2602's prose series patterns omit the 1810 series, but its printed list contains four 1810 parts — the list governs and all 55 printed parts ship. N2543REV's hosted filename says "Thick Film and Thin Film" while the memo's printed title is "Select Riedon™ Custom Resistors" — the printed title governs.
Schedule, as printed: N2543REV — revised 2025-09-15, last time buy 2026-02-27, last ship 2026-08-31 (all passed). SPD2602 — issued 2026-05-29, last time buy 2026-09-30 (still open), last ship 2026-12-15 (still ahead). OSP2311 — issued 2023-03-31, last time buy 2023-12-31, last ship 2024-06-30 (all passed).
Verification standard: Bourns-authored memos only, opened in full first-hand, part tokens taken from each memo's printed list region with every count asserted at build, cross-validated against an independent layout extraction, and checked for zero overlap against the shipped Bourns v1 and v2 files. Facts only — no memo prose reproduced beyond short operative quotations.
| Memo | Part to be Discontinued | Replacement Part | Last Time Buy | Last Ship |
|---|---|---|---|---|
| N2543REV | CBR0402-100RJ1 | None named | 2026-02-27 | 2026-08-31 |
| N2543REV | CMF1206-12K4F1 | None named | 2026-02-27 | 2026-08-31 |
| N2543REV | TFC2007-10MF1 | None named | 2026-02-27 | 2026-08-31 |
| SPD2602 | 1500-1D | None named | 2026-09-30 | 2026-12-15 |
| SPD2602 | 1821-28-A1 | None named | 2026-09-30 | 2026-12-15 |
| SPD2602 | 72296 | None named | 2026-09-30 | 2026-12-15 |
| OSP2311 | 1965-20-A00 | None named | 2023-12-31 | 2024-06-30 |
| OSP2311 | 1965-50-A13 | None named | 2023-12-31 | 2024-06-30 |
Sample rows are copied verbatim from the paid dataset file (the paid file carries the full series detail, dates and a source URL per record).
Full file: all 599 records from N2543REV + SPD2602 + OSP2311, plus buyer notes and honesty notes. Clean Markdown, compiled 2026-10-22.
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Facts compiled from Bourns, Inc.'s published Product Obsolescence Memos; not affiliated with or endorsed by Bourns. Trademarks belong to their owners. Verify the current status of any specific part against the original memo before committing a design or a purchase order.