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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMJD122T4
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mjd122t4.step/mjd122t4.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (15 pp, sha256
f47b5fb35fecff32, retrieved 2026-09-21, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).