component

BFS19

Public Made by Adom

by adom

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

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Generated by kicad-footprint-generator · KiCad file format 20260206
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bfs19-hero.glb bfs19: hero GLB from the etched model (keeps the MPN mark) · Ray 3h ago
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BFS19

Nexperia · Bipolar (BJT) · SOT-23

BFS19 from Nexperia, 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 B passive Base terminal of the NPN transistor; the datasheet gives no base-specific limit, and the emitter-base limit is VEBO = 5 V max with collector open.
2 E passive Emitter terminal of the NPN transistor; the emitter-base voltage limit is VEBO = 5 V max with collector open.
3 C passive Collector terminal of the NPN transistor; limits are VCBO = 30 V max (open emitter), VCEO = 20 V max (open base), and IC = 30 mA max DC.

Key specifications

Parameter Value
Manufacturer Nexperia
Package SOT-23
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 voltage VCBO 30 V open emitter 4
collector-emitter voltage VCEO 20 V open base 4
emitter-base voltage VEBO 5 V open collector 4
collector current (DC) IC 30 mA 4
peak collector current ICM 30 mA 4
total power dissipation Ptot 250 mW Tamb ≤ 25 °C; note 1 4
storage temperature Tstg -65 150 °C 4
junction temperature Tj 150 °C 4
operating ambient temperature Tamb -65 150 °C 4
collector cut-off current ICBO 100 nA IE = 0; VCB = 20 V 5
collector cut-off current ICBO 10 µA IE = 0; VCB = 20 V; Tj = 100 °C 5
emitter cut-off current IEBO 100 nA IC = 0; VEB = 5 V 5
DC current gain hFE 65 225 IC = 1 mA; VCE = 10 V 5
base-emitter voltage VBE 650 740 mV IC = 1 mA; VCE = 10 V 5
thermal resistance from junction to ambient Rth(j-a) 500 K/W note 1 (transistor mounted on FR4 PCB) 5

CAD (KiCad official)

  • Symbol: BFS19
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: bfs19-etched.step / bfs19-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bfs19.step / bfs19.glb are the bare package body.

Provenance

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

  • Datasheet: Nexperia datasheet (8 pp, sha256 1781f890b6ba5a47, retrieved 2026-10-17, tier: manufacturer)
  • 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