FCX491TA

@@ -0,0 +1,45 @@+# FCX491TA++**Diodes Incorporated** · Bipolar (BJT) · SOT-89++FCX491TA from Diodes Incorporated, in a SOT-89. 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 | B | input | Base terminal of the NPN transistor. Drive current into the base to turn the device on; VBE(on) ≈ 0.83 V typ, VBE(sat) ≈ 0.965 V typ at IC = 1 A, IB = 100 mA. Emitter-base breakdown VEBO = 7 V min. |+| 2 | C | passive | Collector terminal of the NPN transistor; also bonded to the SOT89 exposed back-side heat-slug tab. Rated VCEO = 60 V, VCBO = 80 V, IC = 1 A continuous / ICM = 2 A peak. Tab acts as the primary thermal path (RθJL = 22 °C/W). |+| 3 | E | passive | Emitter terminal of the NPN transistor. Reference terminal for VBE and VCE; VCE(sat) ≈ 160 mV typ at IC = 1 A, IB = 100 mA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Diodes Incorporated |+| Package | SOT-89 |+| Category | Transistors/Thyristors |+| Pins | 3 |++## Ordering variants++Same part, different packaging or reel option.++- `FCX491TA`+- `FCX491TAQTA`++## CAD (KiCad official)++- Symbol: `FCX491TA`+- Footprint: `Package_TO_SOT_SMD:SOT-89-3`+- 3D model: SOT-89 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Diodes Incorporated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586193920275992576) (7 pp, sha256 `52c218b9396374d4`, 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/fcx491ta-datasheet.pdf)

@@ -0,0 +1,34 @@+{+  "slug": "fcx491ta",+  "version": "0.1.0",+  "type": "component",+  "description": "Diodes Incorporated Bipolar (BJT), SOT-89. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "transistors-thyristors",+    "fcx491ta"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "fcx491ta.kicad_sym",+    "fcx491ta.kicad_mod",+    "fcx491ta.glb",+    "fcx491ta.step",+    "fcx491ta.lbr",+    "docs/hero.png",+    "docs/fcx491ta-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file