Discontinuation taken from JST's own obsolescence letters, discontinuation notices and G-series REPORTs — five JST Corporation (Waukegan, IL) Operations Dept letters (four mirrored by the dac-group notification service, the 2015-03-25 letter by AllElco), two signed J.S.T. (U.K.) Ltd. notices hosted as Farnell datasheet PDFs, and J.S.T. Mfg. Co., Ltd. REPORT G26-02507 Rev. 1 mirrored by PK Components, every one opened in full. JST publishes no public EOL list or PCN portal an automated reader can open, and no JST-authored PCN PDFs were found on the Mouser, DigiKey or TTI mirrors. The 8 notices: 2014-06-09 letter (2 records), 2019-11-08 series letter (20 records — the FJ, 1.25FJ, JSBY, JSEY and KSEY parts table, orders accepted until 17 April 2020, no replacement), 2020-04-21 letter (5 records), 2020-07-28 REV.2 letter (2 records — R22-8(N) and R22-8(NJ), the file's only named replacement, (W)22-8), JST (UK) PDN 2019-04-26 (1 record — 02T-WPJV-2-RM, replacement printed N/A), JST (UK) EOL notification 2020-01-27 (2 records — LC-04B and GS2.5-0.5, replacement printed None) and REPORT G26-02507 Rev. 1 (130 records — through-hole CS / CSW / FE / FMK / FMZ / JE / JED / MJ / SZ connectors discontinued because the water-repellent agent is ending; no PCB-compatible alternative).
Time-critical: G26-02507 Rev. 1 is an advance discontinuation — the 130 through-hole parts are scheduled for discontinuation at the end of 2027 (when JST's inventory of the water-repellent agent is consumed; no LTB/LTS dates printed). Every other notice's window has closed.
Counting basis, stated plainly: one record per part number printed in a notice's own discontinued list (2 + 1 + 20 + 5 + 2 + 1 + 2 + 130 = 163 records). Only 3 records carry a printed per-part replacement.
Honesty notes: G26-02507 Rev. 1 supersedes Rev. 0 — the 16 rows Rev. 1 dropped (the FM, ROM and TCZ series and 5 FE parts) are not in this file and are listed in the file's research notes. JST's official EOL Products list PDF (jst.co.jp, roughly 1,925 part rows, no dates or replacements, with a text layer that truncates suffixes) is not in this file — held as a v2 slice and stated in the file. JST Request for Change G25-08787 (discontinuation of RWZ housing stamping) was opened in full and excluded by type: its 36 appendix parts are not discontinued products.
Verification standard: JST-authored notices only — the 7 notices above, each opened in full. All change-only notices (plating, packaging, stamping, site or supplier additions) and all distributor lifecycle claims are excluded.
| Notice | Part to be Discontinued | Replacement Part | Last Time Buy | Last Ship |
|---|---|---|---|---|
| G26-02507 Rev. 1 | MJ-88U-SD313K-T(LF)(SN) | None named | Not printed | End of 2027 (scheduled, as printed) |
| G26-02507 Rev. 1 | (D)B31B-CSHK (LF)(SN)(N) | None named | Not printed | End of 2027 (scheduled, as printed) |
| JST US letter 2020-07-28 | R22-8(N) | (W)22-8 | Not printed | Not printed |
| JST US letter 2019-11-08 | (W)06P-FJ | None named | 2020-04-17 | Not printed |
| JST US letter 2015-03-25 | UB-MC5ABR3-SD204-4S-TB NMP | UB-MC5ABR3-SD204-4S-1-TB NMP | Not printed | Not printed |
| JST US letter 2014-06-09 | ICM-MA2A-C454N | None named | Not printed | Not printed |
| JST (UK) EOL 2020-01-27 | LC-04B | None (as printed) | 2019-11-28 | N/A (as printed) |
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 162 discontinuance records from JST's 7 notices above, plus buyer notes and honesty notes. Clean Markdown, compiled 2026-10-22.
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Facts compiled from JST's published obsolescence letters, discontinuation notices and reports; not affiliated with or endorsed by JST. 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.