# BCX52

**Yangzhou Yangjie Elec Tech** · Bipolar (BJT) · SOT-89

BCX52 from Yangzhou Yangjie Elec Tech, 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; VEBO limit is -5 V (IE=-100uA, IC=0). |
| 2 | C | passive | Collector, joined to the exposed tab; VCEO -60 V, VCBO -60 V, IC max -1 A, PC 500 mW. |
| 3 | E | passive | Emitter of the PNP transistor; VEBO limit is -5 V relative to the base. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| 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 |
|---|---|---|---|---|---|---|---|
| Collector-Emitter Voltage | VCEO |  |  | -60 | V | IC=-1mA, IB=0 | 2 |
| Collector-Base Voltage | VCBO |  |  | -60 | V | IC=-100uA, IE=0 | 2 |
| Emitter-Base Voltage | VEBO |  |  | -5 | V | IE=-100uA, IC=0 | 2 |
| Collector-Base cut-off current | ICBO |  |  | -100 | nA | VCB=-30V | 2 |
| Emitter-Base cut-off current | IEB0 |  |  | -100 | nA | VEB=-5V | 2 |
| DC Current Gain hFE1 | hFE1 | 63 |  | 250 |  | VCE=-2V IC=-150mA | 2 |
| DC Current Gain hFE2 | hFE2 | 63 |  |  |  | VCE=-2V IC=-5mA | 2 |
| DC Current Gain hFE3 | hFE3 | 40 |  |  |  | VCE=-2V IC=-500mA | 2 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  |  | -0.5 | V | IC=-500mA IB=-50mA | 2 |
| Base-Emitter Voltage | VBE |  |  | -1 | V | VCE=-2V IC=-500mA | 2 |
| Transition Frequency | fT | 50 |  |  | MHz | IC=-10mA, VCE=-5V,f=100MHz | 2 |
| Collector-Emitter Voltage (maximum rating) | VCEO |  |  | -60 | V | IC=-1mA, IB=0 | 1 |
| Collector-Base Voltage (maximum rating) | VCBO |  |  | -60 | V | IC=-100uA, IE=0 | 1 |
| Emitter-Base Voltage (maximum rating) | VEBO |  |  | -5 | V | IE=-100uA, IC=0 | 1 |
| Collector Current | IC |  |  | -1 | A |  | 1 |
| Collector Power Dissipation | PC |  |  | 500 | mW |  | 1 |
| Operation Junction Temperature | Tj | -55 |  | 150 | ℃ |  | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance From Junction To Ambient | RθJA |  |  | 250 | ℃/W |  | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | ● Terminals: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |

## CAD (KiCad official)

- Symbol: `BCX52`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `bcx52-etched.step` / `bcx52-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bcx52.step` / `bcx52.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](docs/bcx52-datasheet.pdf) (5 pp, sha256 `cabdaea04bf2e864`, retrieved 2026-11-04, 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/bcx52-datasheet.pdf)