component
MJD122T4
Public Made by Adomby adom
STMicroelectronics Darlington Transistors, TO-252-2(DPAK). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+39@@ -0,0 +1,39 @@+# MJD122T4++**STMicroelectronics** · Darlington Transistors · TO-252-2(DPAK)++MJD122T4 from STMicroelectronics, in a TO-252-2(DPAK). 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 for Darlington pair control; maximum base current 120 mA, minimum DC current gain hFE 1000 at IC = 4 A, integrated base resistor R1 = 7 kΩ. |+| 2 | C | output | Collector output with thermal tab connection; maximum collector current 8 A (16 A peak), maximum VCEO 100 V, typical VCE(sat) 4 V at IC = 8 A. |+| 3 | E | passive | Emitter return with integrated resistor R2 = 70 Ω; maximum emitter-base reverse voltage 5 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | TO-252-2(DPAK) |+| Category | Transistors/Thyristors |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `MJD122T4`+- Footprint: `Package_TO_SOT_SMD:TO-252-2`+- 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)+- 3D model files: `mjd122t4-etched.step` / `mjd122t4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mjd122t4.step` / `mjd122t4.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/mjd122t4.pdf) (15 pp, sha256 `f47b5fb35fecff32`, retrieved 2026-09-21, tier: manufacturer)+- **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/mjd122t4-datasheet.pdf)
page.jsonadded+111@@ -0,0 +1,111 @@+{+ "slug": "mjd122t4",+ "version": "0.1.0",+ "type": "component",+ "description": "STMicroelectronics Darlington Transistors, TO-252-2(DPAK). Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "transistors-thyristors",+ "mjd122t4",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "mjd122t4.kicad_sym",+ "mjd122t4.kicad_mod",+ "mjd122t4.glb",+ "mjd122t4.step",+ "mjd122t4.lbr",+ "docs/hero.png",+ "docs/mjd122t4-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "MJD122T4",+ "manufacturer": "STMicroelectronics",+ "package": "TO-252-2(DPAK)",+ "pin_count": 3,+ "category": "Transistors/Thyristors",+ "subcategory": "Darlington Transistors",+ "datasheet": "https://www.st.com/resource/en/datasheet/mjd122t4.pdf",+ "parts": {+ "symbol": "mjd122t4.kicad_sym",+ "footprint": "mjd122t4.kicad_mod",+ "model_3d": "mjd122t4-etched.glb",+ "model_3d_plain": "mjd122t4.glb",+ "model_3d_step": "mjd122t4-etched.step",+ "model_3d_step_plain": "mjd122t4.step",+ "lbr": "mjd122t4.lbr"+ },+ "distributor_links": {+ "lcsc": "C138774"+ },+ "pins": [+ {+ "number": "1",+ "name": "B",+ "type": "input",+ "description": "Base input for Darlington pair control; maximum base current 120 mA, minimum DC current gain hFE 1000 at IC = 4 A, integrated base resistor R1 = 7 kΩ."+ },+ {+ "number": "2",+ "name": "C",+ "type": "output",+ "description": "Collector output with thermal tab connection; maximum collector current 8 A (16 A peak), maximum VCEO 100 V, typical VCE(sat) 4 V at IC = 8 A."+ },+ {+ "number": "3",+ "name": "E",+ "type": "passive",+ "description": "Emitter return with integrated resistor R2 = 70 Ω; maximum emitter-base reverse voltage 5 V."+ }+ ],+ "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": 15,+ "cost_usd": 0.1272,+ "at": "2026-09-21T17:14:22"+ },+ "datasheet": {+ "url": "https://www.st.com/resource/en/datasheet/mjd122t4.pdf",+ "pages": 15,+ "sha256": "f47b5fb35fecff32",+ "source_tier": "mfr"+ },+ "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]"+ }+}