component
BC857BW
Public Made by Adomby adom
HUXN Bipolar (BJT), SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBC857BW
HUXN · Bipolar (BJT) · SOT-323
BC857BW from HUXN, 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 | BASE | passive | Base terminal of the BC857BW PNP transistor; the datasheet gives an emitter-base breakdown voltage VEBO of -5 V and a continuous collector current IC of -0.1 A. |
| 2 | EMITTER | passive | Emitter terminal of the BC857BW PNP transistor; the emitter-base rating is VEBO = -5 V. |
| 3 | COLLECTOR | passive | Collector terminal of the BC857BW PNP transistor; for the BC857W the maximum ratings are VCBO = -50 V and VCEO = -45 V, with collector power dissipation PC of 150 mW. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HUXN |
| Package | SOT-323 |
| Category | Transistors/Thyristors |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Collector-base breakdown voltage (BC857W) | VCBO | -50 | V | IC= -10μA, IE=0 | 2 | ||
| Collector-emitter breakdown voltage (BC857W) | VCEO | -45 | V | IC= -10mA, IB=0 | 2 | ||
| Emitter-base breakdown voltage | VEBO | -5 | V | IE= -1μA, IC=0 | 2 | ||
| DC current gain (BC857BW, 857BW group) | hFE | 220 | 475 | VCE= -5V, IC= -2mA | 2 | ||
| Collector cut-off current | ICBO | -15 | nA | VCB= -30 V , IE=0 | 2 | ||
| Collector-emitter saturation voltage | VCE(sat) | -0.65 | V | IC=-100mA, IB= -5mA | 2 | ||
| Base-emitter saturation voltage | VBE(sat) | -1.1 | V | IC= -100mA, IB= -5mA | 2 | ||
| Transition frequency | fT | 100 | MHz | VCE= -5V, IC= -10mA, f=100MHz | 2 | ||
| Collector capacitance | Cob | 4.5 | pF | VCB=-10V, f=1MHz | 2 | ||
| Collector-base voltage (BC857W) | VCBO | -50 | V | 1 | |||
| Collector-emitter voltage (BC857W) | VCEO | -45 | V | 1 | |||
| Emitter-base voltage | VEBO | -5 | V | 1 | |||
| Collector current, continuous | IC | -0.1 | A | 1 | |||
| Collector power dissipation | PC | 150 | mW | 1 | |||
| Junction temperature | TJ | 150 | ℃ | 1 | |||
| Storage temperature | Tstg | -65 | 150 | ℃ | 1 |
CAD (KiCad official)
- Symbol:
BC857BW - Footprint:
Package_TO_SOT_SMD:SOT-323_SC-70 - 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files:
bc857bw-etched.step/bc857bw-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bc857bw.step/bc857bw.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HUXN datasheet (4 pp, sha256
a217278754e52932, retrieved 2026-10-17, 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).