component
FMMT634
Public Made by Adomby adom
YFW Darlington Transistors, SOT-23-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+39@@ -0,0 +1,39 @@+# FMMT634++**YFW** · Darlington Transistors · SOT-23-3L++FMMT634 from YFW, in a SOT-23-3L. 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 input of NPN Darlington pair; VBE(on) = 1.50 V typ at VCE = 5 V, IC = 1 A; drives collector current up to 900 mA continuous (ICM 5 A peak). |+| 2 | E | passive | Emitter; BVEBO = 12 V; emitter cut-off current IEBO ≤ 10 nA at VEB = 7 V. |+| 3 | C | output | Collector; BVCEO = 100 V, BVCBO = 120 V; IC max 900 mA continuous, ICM 5 A peak; VCE(sat) ≤ 0.96 V at IC = 900 mA, IB = 5 mA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | YFW |+| Package | SOT-23-3L |+| Category | Transistors/Thyristors |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `FMMT634`+- Footprint: `Package_TO_SOT_SMD:SOT-23-3`+- 3D model: SOT-23-3L (KiCad packages3D, STEP)+- 3D model files: `fmmt634-etched.step` / `fmmt634-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fmmt634.step` / `fmmt634.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [YFW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603387686019751936) (4 pp, sha256 `24a0159b2d5e6073`, retrieved 2026-09-18, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-sonnet-4-6` (text+vision), consensus `claude-opus-4-7` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/fmmt634-datasheet.pdf)
page.jsonadded+113@@ -0,0 +1,113 @@+{+ "slug": "fmmt634",+ "version": "0.1.0",+ "type": "component",+ "description": "YFW Darlington Transistors, SOT-23-3L. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "transistors-thyristors",+ "fmmt634",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "fmmt634.kicad_sym",+ "fmmt634.kicad_mod",+ "fmmt634.glb",+ "fmmt634.step",+ "fmmt634.lbr",+ "docs/hero.png",+ "docs/fmmt634-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "FMMT634",+ "manufacturer": "YFW",+ "package": "SOT-23-3L",+ "pin_count": 3,+ "category": "Transistors/Thyristors",+ "subcategory": "Darlington Transistors",+ "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603387686019751936",+ "parts": {+ "symbol": "fmmt634.kicad_sym",+ "footprint": "fmmt634.kicad_mod",+ "model_3d": "fmmt634-etched.glb",+ "model_3d_plain": "fmmt634.glb",+ "model_3d_step": "fmmt634-etched.step",+ "model_3d_step_plain": "fmmt634.step",+ "lbr": "fmmt634.lbr"+ },+ "distributor_links": {+ "lcsc": "C25836742"+ },+ "pins": [+ {+ "number": "1",+ "name": "B",+ "type": "input",+ "description": "Base input of NPN Darlington pair; VBE(on) = 1.50 V typ at VCE = 5 V, IC = 1 A; drives collector current up to 900 mA continuous (ICM 5 A peak)."+ },+ {+ "number": "2",+ "name": "E",+ "type": "passive",+ "description": "Emitter; BVEBO = 12 V; emitter cut-off current IEBO ≤ 10 nA at VEB = 7 V."+ },+ {+ "number": "3",+ "name": "C",+ "type": "output",+ "description": "Collector; BVCEO = 100 V, BVCBO = 120 V; IC max 900 mA continuous, ICM 5 A peak; VCE(sat) ≤ 0.96 V at IC = 900 mA, IB = 5 mA."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-sonnet-4-6",+ "primary_mode": "text+vision",+ "consensus_model": "claude-opus-4-7",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "vision extraction: provenance cannot be text-verified; needs consensus"+ ],+ "pages_sent": 4,+ "cost_usd": 0.22,+ "at": "2026-09-18T00:45:20"+ },+ "datasheet": {+ "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603387686019751936",+ "pages": 4,+ "sha256": "24a0159b2d5e6073",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 3,+ "described": 3,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}