# A94-TA

**Changjiang Electronics Tech (CJ)** · Bipolar Transistors - BJT · TO-92

A94-TA from Changjiang Electronics Tech (CJ), in a TO-92. 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 | EMITTER | passive | Emitter of the PNP transistor; emitter-base breakdown voltage V(BR)EBO is -5 V min and the absolute maximum VEBO is -5 V. |
| 2 | BASE | passive | Base of the PNP transistor; hFE(1) is 80 to 300 at VCE=-10V, IC=-10mA, and VBE(sat) is -0.75 V max at IC=-10mA, IB=-1mA. |
| 3 | COLLECTOR | passive | Collector of the PNP transistor; VCBO and VCEO are both -400 V, and the maximum collector current IC is -0.2 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjiang Electronics Tech (CJ) |
| Package | TO-92 |
| 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 |
| 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 |
| DC current gain | hFE(1) | 80 |  | 300 |  | VCE=-10V, IC=-10mA | 1 |
| DC current gain | hFE(2) | 70 |  |  |  | VCE=-10V, IC=-1mA | 1 |
| DC current gain | hFE(3) | 60 |  |  |  | VCE=-10V, IC=-100mA | 1 |
| DC current gain | hFE(4) | 80 |  |  |  | VCE=-10V, IC=-50mA | 1 |
| Collector-emitter saturation voltage | VCE(sat)(1) |  |  | -0.2 | V | IC=-10mA,IB=-1mA | 1 |
| Collector-emitter saturation voltage | VCE(sat)(2) |  |  | -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 | Ta=25℃ | 1 |
| Collector-Emitter Voltage | VCEO |  |  | -400 | V | Ta=25℃ | 1 |
| Emitter-Base Voltage | VEBO |  |  | -5 | V | Ta=25℃ | 1 |
| Collector Current | IC |  |  | -0.2 | A | Ta=25℃ | 1 |
| Collector Power Dissipation | PC |  |  | 625 | mW | Ta=25℃ | 1 |
| Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance From Junction To ambient | RθJA |  | 200 |  | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `A94-TA`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files: `a94-ta-etched.step` / `a94-ta-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `a94-ta.step` / `a94-ta.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-ta-datasheet.pdf) (2 pp, sha256 `0cd87a59cebb7c2a`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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-ta-datasheet.pdf)