# BC817 6B

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

BC817 6B from Changjing, 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 of the NPN transistor; VEBO max is 5 V and the base-emitter saturation voltage is 1.2 V max at IC=500mA, IB=50mA. |
| 2 | EMITTER | passive | Emitter of the NPN transistor; emitter-base voltage rated 5 V and continuous collector current rated 0.5 A. |
| 3 | COLLECTOR | passive | Collector of the NPN transistor; VCBO 50 V, VCEO 45 V, continuous current 0.5 A, power dissipation 0.3 W. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `BC817 6B`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bc817-6b-etched.step` / `bc817-6b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bc817-6b.step` / `bc817-6b.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/8586174147764899840) (2 pp, sha256 `39de72837d9ca295`, retrieved 2026-10-09, 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/bc817-6b-datasheet.pdf)