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BST52
Public Made by Adomby adom
Nexperia Darlington Transistors, SOT-89-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+38@@ -0,0 +1,38 @@+# BST52++**Nexperia** · Darlington Transistors · SOT-89-3++BST52 from Nexperia, in a SOT-89-3. 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 | E | passive | Emitter of the NPN Darlington pair. Common return path for collector current; VEBO limited to 5 V (open collector). |+| 2 | C | passive | Collector of the NPN Darlington pair. Main current-handling terminal; VCEO up to 80 V, IC up to 1 A (peak 2 A). Also connected to the SOT89 heat-spreading tab for improved thermal dissipation. |+| 3 | B | passive | Base control input of the NPN Darlington pair. Drives the compound transistor through an integrated base-emitter resistor with an anti-parallel diode; IB limited to 100 mA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Nexperia |+| Package | SOT-89-3 |+| Category | Transistors/Thyristors |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `BST52`+- Footprint: `Package_TO_SOT_SMD:SOT-89-3`+- 3D model: SOT-89-3 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/BST52.pdf) (8 pp, sha256 `8ca616767aa12634`, retrieved 2026-08-17, tier: manufacturer)+- **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/bst52-datasheet.pdf)
page.jsonadded+34@@ -0,0 +1,34 @@+{+ "slug": "bst52",+ "version": "0.1.0",+ "type": "component",+ "description": "Nexperia Darlington Transistors, SOT-89-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "transistors-thyristors",+ "bst52"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "bst52.kicad_sym",+ "bst52.kicad_mod",+ "bst52.glb",+ "bst52.step",+ "bst52.lbr",+ "docs/hero.png",+ "docs/bst52-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "visibility": "public",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}