# MMST2907A

**Yangzhou Yangjie Elec Tech** · Bipolar (BJT) · SOT-323

MMST2907A from Yangzhou Yangjie Elec Tech, 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 | B | input | Base of the PNP transistor; emitter-base voltage limit is -5 V (VEBO). |
| 2 | E | passive | Emitter of the PNP transistor; emitter-base breakdown is -5 V minimum at IE=-10 µA. |
| 3 | C | passive | Collector of the PNP transistor; rated VCBO/VCEO of -60 V and continuous collector current of -600 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SOT-323 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Collector-base breakdown voltage | VCBO |  |  | -60 | V | IC=-10uA,IE=0 | 2 |
| Collector-emitter breakdown voltage | VCEO* |  |  | -60 | V | IC =-10mA,IB=0 | 2 |
| Emitter-base breakdown voltage | VEBO |  |  | -5 | V | IE=-10μA,IC=0 | 2 |
| Collector-emitter cut-off current | ICEO | -50 |  |  | nA | VCE=-35V, IB=0 | 2 |
| Collector-base cut-off current | ICBO | -10 |  |  | nA | VCB=-50V, IE =0 | 2 |
| Emitter-base cut-off current | IEBO | -10 |  |  | nA | VEB=-3 V, IC =0 | 2 |
| DC current gain | hFE | 100 |  |  |  | VCE=-10V,IC=-1mA | 2 |
| DC current gain | hFE | 100 |  | 300 |  | VCE=-10V,IC=-150mA | 2 |
| Collector-emitter saturation voltage | VCE(sat) | -1.6 |  |  | V | IC=-500mA,IB=-50mA | 2 |
| Base-emitter saturation voltage | VBE(sat) | -2.6 |  |  | V | IC=-500mA,IB=-50mA | 2 |
| Transition frequency | fT | 200 |  |  | MHz | VCE=-20V,IC=-50mA,f=100MHz | 2 |
| Delay time | td |  |  | 10 | ns | VCC=-30V, IC=-150mA,IB1=-15mA | 2 |
| Rise time | tr |  |  | 40 | ns |  | 2 |
| Storage time | ts |  |  | 80 | ns | VCC=-30V,IC=-150mA, IB1=IB2=-15mA | 2 |
| Fall time | tf |  |  | 30 | ns |  | 2 |
| Collector-base voltage | VCBO | -60 |  |  | V | Ta=25℃ | 1 |
| Collector-emitter voltage | VCEO | -60 |  |  | V | Ta=25℃ | 1 |
| Emitter-base voltage | VEBO | -5 |  |  | V | Ta=25℃ | 1 |
| Collector current | IC | -600 |  |  | mA | Ta=25℃ | 1 |
| Collector power dissipation | PC |  |  | 200 | mW | Ta=25℃ | 1 |
| Operation junction temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `MMST2907A`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `mmst2907a-etched.step` / `mmst2907a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmst2907a.step` / `mmst2907a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588918706009755648) (5 pp, sha256 `64d7e3c5d5287e2c`, 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/mmst2907a-datasheet.pdf)