# A94

**Changjiang Electronics Tech (CJ)** · Bipolar Transistors - BJT · SOT-89-3L

A94 from Changjiang Electronics Tech (CJ), in a SOT-89-3L. 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 A94 PNP transistor; the emitter-base breakdown voltage V(BR)EBO is -5 V at IE=-100μA with IC=0. |
| 2 | COLLECTOR | passive | Collector terminal of the A94 PNP transistor, rated for VCBO and VCEO of -400 V, continuous collector current of -0.2 A and pulsed collector current of -0.3 A. |
| 3 | EMITTER | passive | Emitter terminal of the A94 PNP transistor; the emitter-base breakdown voltage V(BR)EBO is -5 V at IE=-100μA with IC=0. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjiang Electronics Tech (CJ) |
| Package | SOT-89-3L |
| Category | Transistors |
| 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 | V(BR)CBO | -400 |  |  | V | IC= -100μA, IE=0 | 1 |
| Collector-emitter breakdown voltage | V(BR)CEO | -400 |  |  | V | IC= -1mA, IB=0 | 1 |
| Emitter-base breakdown voltage | V(BR)EBO | -5 |  |  | V | IE=-100μA, IC=0 | 1 |
| DC current gain hFE(1) | hFE(1) | 80 |  | 300 |  | VCE=-10V, IC=-10mA | 1 |
| DC current gain hFE(2) | hFE(2) | 70 |  |  |  | VCE=-10V, IC=-1mA | 1 |
| DC current gain hFE(3) | hFE(3) | 60 |  |  |  | VCE=-10V, IC=-100mA | 1 |
| DC current gain hFE(4) | hFE(4) | 80 |  |  |  | VCE=-10V, IC=-50mA | 1 |
| Collector cut-off current | ICBO |  |  | -0.1 | μA | VCB=-400V, IE=0 | 1 |
| Collector cut-off current | ICEO |  |  | -5 | μA | VCE=-400V, IB=0 | 1 |
| Emitter cut-off current | IEBO |  |  | -0.1 | μA | VEB= -4V, IC=0 | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | -0.2 | V | IC=-10mA, IB=-1mA | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | -0.3 | V | IC=-50mA, IB=-5mA | 1 |
| Base-emitter saturation voltage | VBE(sat) |  |  | -0.75 | V | IC=-10mA, IB= -1mA | 1 |
| Transition frequency | fT | 50 |  |  | MHz | VCE=-20V, IC=-10mA, f=30MHz | 1 |
| 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 |  |  | -0.2 | A | Continuous | 1 |
| Collector current, pulsed | ICM |  |  | -0.3 | A | Pulsed | 1 |
| Collector power dissipation | PC |  |  | 0.5 | W |  | 1 |
| Junction temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `A94`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files: `a94-etched.step` / `a94-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `a94.step` / `a94.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjiang Electronics Tech (CJ) datasheet](docs/a94-datasheet.pdf) (2 pp, sha256 `f6891cdf3aff51b7`, retrieved 2026-11-05, 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/a94-datasheet.pdf)