# BCX56-10

**Changjing** · Bipolar (BJT) · SOT-89-3L

BCX56-10 from Changjing, in a SOT-89-3L. 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; the datasheet limits base current to IB 0.1 A continuous and IBM 0.2 A peak (tp<1ms). |
| 2 | COLLECTOR | passive | Collector of the NPN transistor; the datasheet limits collector current to IC 1 A and collector-emitter voltage to VCEO 45 V (BCX54), 60 V (BCX55) or 80 V (BCX56). |
| 3 | EMITTER | passive | Emitter of the NPN transistor; the datasheet limits emitter-base voltage to VEBO 5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-89-3L |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `BCX56-10`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files: `bcx56-10-etched.step` / `bcx56-10-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bcx56-10.step` / `bcx56-10.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/8589042100684275712) (5 pp, sha256 `806bdb1ae53cc6d2`, 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/bcx56-10-datasheet.pdf)