# MMBT2222AX

**Shenzhen JingYang** · Bipolar (BJT) · SOT-23

MMBT2222AX from Shenzhen JingYang, 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 | input | Base of the NPN transistor; VEBO max 6 V, with IEBO max 0.1 μA at VEB=3V. |
| 2 | EMITTER | passive | Emitter of the NPN transistor; VCEO 40 V and continuous collector current 0.6 A flow out through this pin. |
| 3 | COLLECTOR | passive | Collector of the NPN transistor; VCBO 75 V, VCEO 40 V, continuous IC 0.6 A, PC 0.25 W. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen JingYang |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `MMBT2222AX`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbt2222ax-etched.step` / `mmbt2222ax-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbt2222ax.step` / `mmbt2222ax.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Shenzhen JingYang datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603181292310061056) (4 pp, sha256 `9f27147771444f34`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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).

[Datasheet PDF](docs/mmbt2222ax-datasheet.pdf)