# KMBTA94

**KEXIN** · Bipolar (BJT) · SOT-23

KMBTA94 from KEXIN, 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 PNP transistor; the emitter-base breakdown voltage VEBO is rated -5 V. |
| 2 | Emitter | passive | Emitter terminal of the PNP transistor; the absolute maximum emitter-base voltage VEBO is -5 V. |
| 3 | Collector | passive | Collector terminal of the PNP transistor; rated for VCEO = -400 V and continuous collector current IC = -200 mA (pulsed ICM = -300 mA). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KEXIN |
| Package | SOT-23 |
| 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 |  |  | -400 | V |  | 1 |
| Collector-emitter voltage | VCEO |  |  | -400 | V |  | 1 |
| Emitter-base voltage | VEBO |  |  | -5 | V |  | 1 |
| Collector current continuous | IC |  |  | -200 | mA |  | 1 |
| Collector current pulsed | ICM |  |  | -300 | mA |  | 1 |
| Collector power dissipation | PC |  |  | 350 | mW |  | 1 |
| Junction temperature | TJ |  |  | 150 | °C |  | 1 |
| Storage temperature range | Tstg | -55 |  | 150 | °C |  | 1 |
| Thermal resistance, junction to ambient | RθJA |  |  | 150 | °C/W |  | 1 |
| Collector-base breakdown voltage | VCBO | -400 |  |  | V | Ic= -100 µA, IE=0 | 1 |
| Collector-emitter breakdown voltage | VCEO | -400 |  |  | V | Ic= -1 mA, IB=0 | 1 |
| Emitter-base breakdown voltage | VEBO | -5 |  |  | V | IE= -100 µA, IC=0 | 1 |
| Collector-base cut-off current | ICBO |  |  | -100 | nA | VCB= -400 V, IE=0 | 1 |
| Emitter cut-off current | IEBO |  |  | -100 | nA | VEB= -4 V, IC=0 | 1 |
| Collector-emitter saturation voltage | VCE(sat)1 |  |  | -0.2 | V | IC=-10 mA, IB=-1 mA | 1 |
| Collector-emitter saturation voltage | VCE(sat)2 |  |  | -0.3 | V | IC=-50 mA, IB=-5 mA | 1 |
| Base-emitter saturation voltage | VBE(sat) |  |  | -0.75 | V | IC= -10 mA, IB= -1 mA | 1 |
| DC current gain | hFE(1) | 80 |  | 300 |  | VCE= -10 V, IC= -10 mA | 1 |
| DC current gain | hFE(2) | 70 |  |  |  | VCE= -10 V, IC= -1 mA | 1 |
| DC current gain | hFE(3) | 40 |  |  |  | VCE= -10 V, IC= -100 mA | 1 |
| Transition frequency | fT | 50 |  |  | MHz | VCE= -20 V, IC= 10 mA, f=30 MHz | 1 |

## CAD (KiCad official)

- Symbol: `KMBTA94`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `kmbta94-etched.step` / `kmbta94-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kmbta94.step` / `kmbta94.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KEXIN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588904710783053824) (2 pp, sha256 `38327d63291abf3c`, retrieved 2026-10-19, 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/kmbta94-datasheet.pdf)