component

BC857BLT1G

Public Made by Adom

by adom

onsemi Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttransistors-thyristorsbc857blt1gfactory-2.0.0extractor-text
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Generated by kicad-footprint-generator · KiCad file format 20260206
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bc857blt1g-etched.glb bc857blt1g: factory component page (tier=lcsc) · Ray 20d ago
bc857blt1g-etched.step bc857blt1g: factory component page (tier=lcsc) · Ray 20d ago
bc857blt1g-hero.glb bc857blt1g: hero GLB from the etched model (keeps the MPN mark) · Ray 20d ago
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bc857blt1g.glb Publish 0.1.0 · Ray 20d ago
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BC857BLT1G

onsemi · Bipolar (BJT) · SOT-23

BC857BLT1G from onsemi, 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; the datasheet gives no separate pin limit, only the series maximum ratings (IC −100 mA continuous, −200 mA peak).
2 EMITTER passive Emitter terminal of the PNP transistor, with emitter-base voltage rated at −5.0 V maximum per the series maximum ratings.
3 COLLECTOR passive Collector terminal of the PNP transistor; for the BC857 series the datasheet lists VCEO −45 V and VCBO −50 V, with collector current −100 mA continuous.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOT-23
Category Transistors/Thyristors
Pins 3

CAD (KiCad official)

  • Symbol: BC857BLT1G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: bc857blt1g-etched.step / bc857blt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bc857blt1g.step / bc857blt1g.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: onsemi datasheet (7 pp, sha256 5b3358db41b73faa, 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