component
BSR57
Public Made by Adomby adom
onsemi JFETs, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+39@@ -0,0 +1,39 @@+# BSR57++**onsemi** · JFETs · SOT-23-3++BSR57 from onsemi, in a SOT-23-3. 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 | Drain | output | Drain terminal with maximum drain-gate voltage of 40 V and drain-source on-voltage not exceeding 0.5 V at VGS = 0 V and ID = 10 mA. |+| 2 | Source | power_in | Source terminal providing the return path and voltage reference for the N-channel JFET. |+| 3 | Gate | input | Gate terminal with gate-source cut-off voltage range of 2.0 V to 6.0 V and maximum forward gate current rating of 50 mA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | SOT-23-3 |+| Category | Transistors/Thyristors |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `BSR57`+- Footprint: `Package_TO_SOT_SMD:SOT-23-3`+- 3D model: SOT-23-3 (KiCad packages3D, STEP)+- 3D model files: `bsr57-etched.step` / `bsr57-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bsr57.step` / `bsr57.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8555348373670240256) (3 pp, sha256 `9b2064bcb1fbbdcb`, retrieved 2026-09-17, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/bsr57-datasheet.pdf)
page.jsonadded+111@@ -0,0 +1,111 @@+{+ "slug": "bsr57",+ "version": "0.1.0",+ "type": "component",+ "description": "onsemi JFETs, SOT-23-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "transistors-thyristors",+ "bsr57",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "bsr57.kicad_sym",+ "bsr57.kicad_mod",+ "bsr57.glb",+ "bsr57.step",+ "bsr57.lbr",+ "docs/hero.png",+ "docs/bsr57-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "BSR57",+ "manufacturer": "onsemi",+ "package": "SOT-23-3",+ "pin_count": 3,+ "category": "Transistors/Thyristors",+ "subcategory": "JFETs",+ "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8555348373670240256",+ "parts": {+ "symbol": "bsr57.kicad_sym",+ "footprint": "bsr57.kicad_mod",+ "model_3d": "bsr57-etched.glb",+ "model_3d_plain": "bsr57.glb",+ "model_3d_step": "bsr57-etched.step",+ "model_3d_step_plain": "bsr57.step",+ "lbr": "bsr57.lbr"+ },+ "distributor_links": {+ "lcsc": "C890260"+ },+ "pins": [+ {+ "number": "1",+ "name": "Drain",+ "type": "output",+ "description": "Drain terminal with maximum drain-gate voltage of 40 V and drain-source on-voltage not exceeding 0.5 V at VGS = 0 V and ID = 10 mA."+ },+ {+ "number": "2",+ "name": "Source",+ "type": "power_in",+ "description": "Source terminal providing the return path and voltage reference for the N-channel JFET."+ },+ {+ "number": "3",+ "name": "Gate",+ "type": "input",+ "description": "Gate terminal with gate-source cut-off voltage range of 2.0 V to 6.0 V and maximum forward gate current rating of 50 mA."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-4-6",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 3,+ "cost_usd": 0.1041,+ "at": "2026-09-17T22:52:57"+ },+ "datasheet": {+ "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8555348373670240256",+ "pages": 3,+ "sha256": "9b2064bcb1fbbdcb",+ "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]"+ }+}