component
CZT127
Public Made by Adomby adom
Changjing Darlington Transistors, SOT-223. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
← Commit history
README.mdadded+38@@ -0,0 +1,38 @@+# CZT127++**Changjing** · Darlington Transistors · SOT-223++CZT127 from Changjing, in a SOT-223. 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 of the PNP Darlington transistor. VEBO max = -5 V. Drive current sets collector current via combined Darlington gain (hFE ≥ 1000 typical at IC = -3 A, VCE = -3 V). |+| 2 | C | passive | Collector of the PNP Darlington transistor. VCBO max = -100 V, VCEO max = -100 V, IC(continuous) = -5 A, PC = 1 W. Tab (large center pad) of the SOT-223 is internally connected to the collector. |+| 3 | E | passive | Emitter of the PNP Darlington transistor. VBE(on) ≈ -2.5 V at IC = -3 A (two Vbe drops due to Darlington). VCE(sat) ≤ -2 V at IC = -3 A, IB = -12 mA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Changjing |+| Package | SOT-223 |+| Category | Transistors/Thyristors |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `CZT127`+- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`+- 3D model: SOT-223 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586181803367944192) (3 pp, sha256 `f209bc4fcfb6864a`, 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/czt127-datasheet.pdf)
page.jsonadded+34@@ -0,0 +1,34 @@+{+ "slug": "czt127",+ "version": "0.1.0",+ "type": "component",+ "description": "Changjing Darlington Transistors, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "transistors-thyristors",+ "czt127"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "czt127.kicad_sym",+ "czt127.kicad_mod",+ "czt127.glb",+ "czt127.step",+ "czt127.lbr",+ "docs/hero.png",+ "docs/czt127-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "visibility": "public",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}