component
SMMBT2222ALT1G
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
markdownSMMBT2222ALT1G
onsemi · Bipolar (BJT) · SOT-23
SMMBT2222ALT1G from onsemi, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | BASE | passive | Base terminal of the NPN general-purpose transistor; the datasheet gives the emitter-base voltage rating VEBO as 6.0 Vdc for the SMMBT2222AL (5.0 Vdc for MMBT2222L). |
| 2 | EMITTER | passive | Emitter terminal of the NPN general-purpose transistor; the datasheet gives the emitter-base voltage rating VEBO as 6.0 Vdc for the SMMBT2222AL (5.0 Vdc for MMBT2222L). |
| 3 | COLLECTOR | passive | Collector terminal of the NPN general-purpose transistor; rated VCEO 40 Vdc and VCBO 75 Vdc for the SMMBT2222AL (30 Vdc and 60 Vdc for MMBT2222L), with continuous collector current 600 mA and peak 1100 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
SMMBT2222ALT1G - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
smmbt2222alt1g-etched.step/smmbt2222alt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smmbt2222alt1g.step/smmbt2222alt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (8 pp, sha256
28b0392b032a9ba7, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(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).