component
MMBTA42LT1G
Public Made by Adomby adom
onsemi Bipolar (BJT), SOT-23. 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
markdownMMBTA42LT1G
onsemi · Bipolar (BJT) · SOT-23
MMBTA42LT1G from onsemi, in a SOT-23. 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 | BASE | input | Base terminal controls transistor conduction; maximum emitter-base voltage rating is 6.0 Vdc. |
| 2 | EMITTER | passive | Emitter terminal; common return path for collector and base currents with maximum emitter-base voltage rating of 6.0 Vdc and saturation voltage of 0.9 Vdc at IC = 20 mAdc, IB = 2.0 mAdc. |
| 3 | COLLECTOR | passive | Collector terminal carries collector current up to 500 mAdc maximum continuous with collector-emitter breakdown voltage of 300 Vdc for MMBTA42. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
MMBTA42LT1G - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbta42lt1g-etched.step/mmbta42lt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbta42lt1g.step/mmbta42lt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (8 pp, sha256
10f73da7a3918e47, retrieved 2026-09-23, 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).