# MMBT2907AT

**YFW** · Bipolar (BJT) · SOT-523

MMBT2907AT from YFW, in a SOT-523. 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 PNP transistor; the datasheet gives emitter-base breakdown voltage VEBO of -5 V and emitter cut-off current IEBO of -100 nA at VEB = -5 V. |
| 2 | Emitter | passive | Emitter terminal of the PNP transistor; the datasheet limits emitter-base voltage to -5 V (VEBO) and gives emitter input capacitance Cib of 30 pF at VEB = -2 V. |
| 3 | Collector | passive | Collector terminal of the PNP transistor; the datasheet rates collector-base voltage VCBO at -60 V, collector-emitter voltage VCEO at -60 V and continuous collector current IC at -600 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | SOT-523 |
| 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 Voltage | VCBO |  |  | -60 | V |  | 1 |
| Collector - Emitter Voltage | VCEO |  |  | -60 | V |  | 1 |
| Emitter - Base Voltage | VEBO |  |  | -5 | V |  | 1 |
| Collector Current - Continuous | IC |  |  | -600 | mA |  | 1 |
| Collector Power Dissipation | PC |  |  | 150 | mW |  | 1 |
| Thermal Resistance, Junction to Ambient | RθJA |  |  | 833 | °C/W |  | 1 |
| Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage Temperature Range | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Collector-base breakdown voltage | VCBO | -60 |  |  | V | Ic= -100 μA, IE= 0 | 1 |
| Collector-emitter breakdown voltage | VCEO | -60 |  |  | V | Ic= -10 mA, IB= 0 | 1 |
| Emitter-base breakdown voltage | VEBO | -5 |  |  | V | IE= -100μA, IC= 0 | 1 |
| Collector-base cut-off current | ICBO |  |  | -100 | nA | VCB= -50 V, IE= 0 | 1 |
| Emitter cut-off current | IEBO |  |  | -100 | nA | VEB= -5V, IC=0 | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | -0.4 | V | IC=-150 mA, IB=-15mA | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | -1.6 | V | IC= -500 mA, IB= -50mA | 1 |
| Base-emitter saturation voltage | VBE(sat) |  |  | -1.3 | V | IC=-150 mA, IB=-15mA | 1 |
| Base-emitter saturation voltage | VBE(sat) |  |  | -2.6 | V | IC= -500 mA, IB= -50mA | 1 |
| DC current gain | hFE(1) | 75 |  |  |  | VCE= -10V, IC=-0.1mA | 1 |
| DC current gain | hFE(2) | 100 |  |  |  | VCE= -10V, IC= -1mA | 1 |
| DC current gain | hFE(4) | 100 |  | 300 |  | VCE= -10V, IC= -150mA | 1 |
| DC current gain | hFE(5) | 50 |  |  |  | VCE= -10V, IC= -500mA | 1 |
| Delay time | td |  |  | 10 | nS |  | 1 |
| Rise time | tr |  |  | 40 | nS |  | 1 |
| Storage time | ts |  |  | 225 | nS |  | 1 |
| Fall time | tf |  |  | 30 | nS |  | 1 |
| Emitter input capacitance | Cib |  |  | 30 | pF | VEB= -2V, IC= 0, f=1MHz | 1 |
| Collector output capacitance | Cob |  |  | 8 | pF | VCB= -10V, IE= 0, f=1MHz | 1 |
| Transition frequency | fT | 200 |  |  | MHz | VCE= -20V, IC= -50mA, f=100MHz | 1 |

## CAD (KiCad official)

- Symbol: `MMBT2907AT`
- Footprint: `Package_TO_SOT_SMD:SOT-523`
- 3D model: SOT-523, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.8 mm nominal SOT-523 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `mmbt2907at-etched.step` / `mmbt2907at-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbt2907at.step` / `mmbt2907at.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YFW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590922131193098241) (2 pp, sha256 `aa9ef648f130a338`, retrieved 2026-10-18, 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/mmbt2907at-datasheet.pdf)