# PZTA94

**Changjing** · Bipolar (BJT) · SOT-223

PZTA94 from Changjing, in a SOT-223. 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 datasheet gives emitter-base breakdown V(BR)EBO of -5 V minimum and emitter-base voltage VEBO of -5 V. |
| 2 | COLLECTOR | passive | Collector terminal; rated at VCBO and VCEO of -400 V, continuous collector current IC of -0.2 A and pulsed ICM of -0.3 A. |
| 3 | EMITTER | passive | Emitter terminal of the PNP transistor; the datasheet specifies emitter-base voltage VEBO of -5 V and emitter-base breakdown V(BR)EBO of -5 V minimum. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-223 |
| 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 breakdown voltage | V(BR)CBO | -400 |  |  | V | IC=-0.1mA,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=-0.1mA,IC=0 | 1 |
| Collector cut-off current | ICBO |  |  | -100 | nA | VCB=-400V,IE=0 | 1 |
| Collector cut-off current | ICEO |  |  | -5 | μA | VCE=-400V,IB=0 | 1 |
| Emitter cut-off current | IEBO |  |  | -100 | nA | VEB=-4V, 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-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 |  | 1 |
| Collector current, pulsed | ICM |  |  | -0.3 | A |  | 1 |
| Collector power dissipation | PC |  |  | 1 | W |  | 1 |
| Operation junction and storage temperature range | TJ,Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal resistance, junction to ambient | RθJA |  |  | 125 | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `PZTA94`
- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`
- 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files: `pzta94-etched.step` / `pzta94-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pzta94.step` / `pzta94.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589838261524344832) (4 pp, sha256 `cd62570ec8351459`, retrieved 2026-10-17, 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/pzta94-datasheet.pdf)