component
BC857CW
Public Made by Adomby adom
Nexperia Bipolar (BJT), SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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BC857CW
Nexperia · Bipolar (BJT) · SOT-323
BC857CW from Nexperia, in a SOT-323. 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 PNP transistor, which controls collector-emitter current; the datasheet gives no separate pin limit for this terminal beyond the device limiting values (emitter-base voltage VEBO -5 V, peak base current IBM -200 mA). |
| 2 | E | passive | Emitter terminal of the PNP transistor; the datasheet gives no separate pin limit for this terminal beyond the device limiting values (emitter-base voltage VEBO -5 V, collector current IC -100 mA). |
| 3 | C | passive | Collector terminal of the PNP transistor; limited to -100 mA continuous collector current (ICM -200 mA peak) and, for the BC857W family, VCEO -45 V with the base open. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOT-323 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
BC857CW - Footprint:
Package_TO_SOT_SMD:SOT-323_SC-70 - 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files:
bc857cw-etched.step/bc857cw-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bc857cw.step/bc857cw.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (13 pp, sha256
6ecc839c70f13953, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).
# BC857CW
**Nexperia** · Bipolar (BJT) · SOT-323
BC857CW from Nexperia, in a SOT-323. 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 PNP transistor, which controls collector-emitter current; the datasheet gives no separate pin limit for this terminal beyond the device limiting values (emitter-base voltage VEBO -5 V, peak base current IBM -200 mA). |
| 2 | E | passive | Emitter terminal of the PNP transistor; the datasheet gives no separate pin limit for this terminal beyond the device limiting values (emitter-base voltage VEBO -5 V, collector current IC -100 mA). |
| 3 | C | passive | Collector terminal of the PNP transistor; limited to -100 mA continuous collector current (ICM -200 mA peak) and, for the BC857W family, VCEO -45 V with the base open. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOT-323 |
| Category | Transistors/Thyristors |
| Pins | 3 |
## CAD (KiCad official)
- Symbol: `BC857CW`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `bc857cw-etched.step` / `bc857cw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bc857cw.step` / `bc857cw.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Nexperia datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588881293869764608) (13 pp, sha256 `6ecc839c70f13953`, 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/bc857cw-datasheet.pdf)