component
BC857B
Public Made by Adomby adom
Slkor SLKORMICRO Elec Bipolar (BJT), SOT-23. 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
markdownBC857B
Slkor SLKORMICRO Elec · Bipolar (BJT) · SOT-23
BC857B from Slkor SLKORMICRO Elec, 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 terminal of the PNP transistor, driven with IB (saturation test at IC = -100 mA, IB = -5 mA gives VBE(sat) of -1.1 V max). |
| 2 | EMITTER | passive | Emitter terminal of the PNP transistor; the datasheet limits emitter-base voltage to VEBO = -5 V and continuous collector current to -0.1 A. |
| 3 | COLLECTOR | passive | Collector terminal of the PNP transistor; for the BC857 the datasheet gives VCBO = -50 V and VCEO = -45 V maximum ratings, with collector current limited to -0.1 A continuous. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Slkor SLKORMICRO Elec |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
BC857B - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
bc857b-etched.step/bc857b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bc857b.step/bc857b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Slkor SLKORMICRO Elec datasheet (4 pp, sha256
b27e6044426e3c60, 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).