# BC856 3B

**DOWO** · Bipolar (BJT) · SOT-23

BC856 3B from DOWO, 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 | BASE | input | Base terminal of the BC856B PNP transistor (marking 3B); the datasheet's maximum emitter-base voltage VEBO is -5 V. |
| 2 | EMITTER | passive | Emitter terminal; the datasheet limits are a maximum emitter-base voltage VEBO of -5 V and a maximum continuous collector current IC of -0.1 A. |
| 3 | COLLECTOR | passive | Collector terminal; the datasheet limits for BC856 are a collector-emitter voltage VCEO of -65 V and a collector power dissipation PC of 200 mW. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `BC856 3B`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bc856-3b-etched.step` / `bc856-3b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bc856-3b.step` / `bc856-3b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [DOWO datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588912052995821568) (3 pp, sha256 `a60e7a117f624099`, 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/bc856-3b-datasheet.pdf)