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MM1W39
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Shandong Jingdao Microelectronics Zener Diodes, SOD-123. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+43@@ -0,0 +1,43 @@+# MM1W39++**Shandong Jingdao Microelectronics** · Zener Diodes · SOD-123++MM1W39 from Shandong Jingdao Microelectronics, in a SOD-123. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | K | passive | Cathode terminal of the zener diode. Marked as pin 1 on the SOD-123 package (typically the banded end). |+| 2 | A | passive | Anode terminal of the zener diode. Marked as pin 2 on the SOD-123 package. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Shandong Jingdao Microelectronics |+| Package | SOD-123 |+| Category | Diodes |+| Pins | 2 |++## Ordering variants++Same part, different packaging or reel option.++- `MM1W39`++## CAD (KiCad official)++- Symbol: `MM1W39`+- Footprint: `Diode_SMD:D_SOD-123`+- 3D model: SOD-123 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Shandong Jingdao Microelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588911852134391808) (3 pp, sha256 `013135782e49243c`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/mm1w39-datasheet.pdf)
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