# MPSA94U

**CBI** · Bipolar (BJT) · SOT-89

MPSA94U from CBI, in a SOT-89. 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 limited to -6 V max (-VEBO) and emitter-base breakdown -V(BR)EBO min 6 V at -IE = 10 µA. |
| 2 | C | passive | Collector of the PNP transistor; rated -VCEO 400 V, -VCBO 400 V and -IC 300 mA max (also connected to the SOT-89 tab per the package outline). |
| 3 | E | passive | Emitter of the PNP transistor; total power dissipation 625 mW max at Ta = 25 °C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | CBI |
| Package | SOT-89 |
| 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 |
|---|---|---|---|---|---|---|---|
| DC Current Gain | hFE | 70 |  |  |  | at -VCE = 10 V, -IC = 1 mA | 1 |
| DC Current Gain | hFE | 80 |  | 300 |  | at -VCE = 10 V, -IC = 10 mA | 1 |
| DC Current Gain | hFE | 60 |  |  |  | at -VCE = 10 V, -IC = 100 mA | 1 |
| Collector Base Cutoff Current | -ICBO |  |  | 0.1 | µA | at -VCB = 300 V | 1 |
| Collector Emitter Cutoff Current | -ICES |  |  | 1 | µA | at -VCE = 400 V | 1 |
| Emitter Base Cutoff Current | -IEBO |  |  | 0.1 | µA | at -VEB = 4 V | 1 |
| Collector Base Breakdown Voltage | -V(BR)CBO | 400 |  |  | V | at -IC = 100 µA | 1 |
| Collector Emitter Breakdown Voltage | -V(BR)CEO | 400 |  |  | V | at -IC = 1 mA | 1 |
| Emitter Base Breakdown Voltage | -V(BR)EBO | 6 |  |  | V | at -IE = 10 µA | 1 |
| Collector Emitter Saturation Voltage | -VCE(sat) |  |  | 0.2 | V | at -IC = 10 mA, -IB = 1 mA | 1 |
| Collector Emitter Saturation Voltage | -VCE(sat) |  |  | 0.5 | V | at -IC = 50 mA, -IB = 5 mA | 1 |
| Base Emitter Saturation Voltage | -VBE(sat) |  |  | 0.75 | V | at -IC = 10 mA, -IB = 1 mA | 1 |
| Collector Output Capacitance | Cob |  |  | 7 | pF | at -VCB = 20 V, f = 1 MHz | 1 |
| Collector Base Voltage | -VCBO |  |  | 400 | V |  | 1 |
| Collector Emitter Voltage | -VCEO |  |  | 400 | V |  | 1 |
| Emitter Base Voltage | -VEBO |  |  | 6 | V |  | 1 |
| Collector Current | -IC |  |  | 300 | mA |  | 1 |
| Total Power Dissipation | Ptot |  |  | 625 | mW |  | 1 |
| Junction Temperature | TJ |  |  | 150 | °C |  | 1 |
| Storage Temperature Range | Tstg | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `MPSA94U`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `mpsa94u-etched.step` / `mpsa94u-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mpsa94u.step` / `mpsa94u.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [CBI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603129095568318464) (3 pp, sha256 `cbf4fa653322ddde`, retrieved 2026-10-18, 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/mpsa94u-datasheet.pdf)