component
BC857BS
Public Made by Adomby adom
FUXINSEMI Bipolar (BJT), SOT-363. 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
markdownBC857BS
FUXINSEMI · Bipolar (BJT) · SOT-363
BC857BS from FUXINSEMI, in a SOT-363. 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 | E1 | passive | Emitter of transistor 1 (PNP); emitter-base voltage limit -5 V, continuous collector current -0.2 A per the maximum ratings. |
| 2 | B1 | passive | Base of transistor 1 (PNP); VCE(sat) max -0.3 V at IC=-10 mA, IB=-0.5 mA. |
| 3 | C2 | passive | Collector of transistor 2 (PNP); collector-emitter voltage limit -45 V and collector-base voltage limit -50 V. |
| 4 | E2 | passive | Emitter of transistor 2 (PNP); emitter-base voltage limit -5 V. |
| 5 | B2 | passive | Base of transistor 2 (PNP); hFE 250-475 for the BC857BS rank at VCE=-5 V, IC=-2 mA. |
| 6 | C1 | passive | Collector of transistor 1 (PNP); collector-emitter voltage limit -45 V and collector-base voltage limit -50 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | FUXINSEMI |
| Package | SOT-363 |
| Category | Transistors/Thyristors |
| Pins | 6 |
CAD (KiCad official)
- Symbol:
BC857BS - Footprint:
Package_TO_SOT_SMD:SOT-363_SC-70-6 - 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files:
bc857bs-etched.step/bc857bs-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bc857bs.step/bc857bs.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: FUXINSEMI datasheet (3 pp, sha256
7a58bf4848642643, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(vision), consensusclaude-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).