component
MMST2222A
Public Made by Adomby adom
Changjing Bipolar (BJT), SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MMST2222A
Changjing · Bipolar (BJT) · SOT-323
MMST2222A from Changjing, in a SOT-323. 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 terminal of the NPN transistor; the datasheet gives no separate pin-level limit, only the device maximum ratings (VCBO 75 V, VEBO 6 V, IC 600 mA continuous, PC 200 mW). |
| 2 | EMITTER | passive | Emitter terminal of the NPN transistor; the datasheet gives no separate pin-level limit, only the device maximum ratings (VCEO 40 V, IC 600 mA continuous). |
| 3 | COLLECTOR | passive | Collector terminal of the NPN transistor; the datasheet gives no separate pin-level limit, only the device maximum ratings (VCBO 75 V, VCEO 40 V, IC 600 mA continuous, PC 200 mW). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-323 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
MMST2222A - Footprint:
Package_TO_SOT_SMD:SOT-323_SC-70 - 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files:
mmst2222a-etched.step/mmst2222a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmst2222a.step/mmst2222a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (4 pp, sha256
65e8da25071cbe64, 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).
# MMST2222A
**Changjing** · Bipolar (BJT) · SOT-323
MMST2222A from Changjing, in a SOT-323. 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 terminal of the NPN transistor; the datasheet gives no separate pin-level limit, only the device maximum ratings (VCBO 75 V, VEBO 6 V, IC 600 mA continuous, PC 200 mW). |
| 2 | EMITTER | passive | Emitter terminal of the NPN transistor; the datasheet gives no separate pin-level limit, only the device maximum ratings (VCEO 40 V, IC 600 mA continuous). |
| 3 | COLLECTOR | passive | Collector terminal of the NPN transistor; the datasheet gives no separate pin-level limit, only the device maximum ratings (VCBO 75 V, VCEO 40 V, IC 600 mA continuous, PC 200 mW). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-323 |
| Category | Transistors/Thyristors |
| Pins | 3 |
## CAD (KiCad official)
- Symbol: `MMST2222A`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `mmst2222a-etched.step` / `mmst2222a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmst2222a.step` / `mmst2222a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589041684440600576) (4 pp, sha256 `65e8da25071cbe64`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/mmst2222a-datasheet.pdf)