# BC856B

**hongjiacheng** · Bipolar (BJT) · SOT-23

BC856B from hongjiacheng, in a SOT-23. 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 | passive | Base terminal of the BC856B PNP transistor; the datasheet gives an emitter-base voltage limit of VEBO -5.0 V (IC=0, IE=-10 µA). |
| 2 | E | passive | Emitter terminal of the BC856B PNP transistor; the emitter-base breakdown voltage V(BR)EBO is -5.0 V minimum (IE=-10 µA, IC=0). |
| 3 | C | passive | Collector terminal of the BC856B PNP transistor; the BC856 collector-base voltage is -80 V and collector-emitter voltage is -65 V, with collector current limited to -0.1 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | hongjiacheng |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `BC856B`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bc856b-etched.step` / `bc856b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bc856b.step` / `bc856b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [hongjiacheng datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755882086144188416) (4 pp, sha256 `eb69d62c5add0b99`, retrieved 2026-10-09, 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/bc856b-datasheet.pdf)