component

BF550

Public Unreviewed

by Ray

Nexperia Bipolar (BJT), SOT-23. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componenttransistors-thyristorsbf550
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

PCB Footprint

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Datasheet

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Download PDF
Contents

README

markdown

BF550

Nexperia · Bipolar (BJT) · SOT-23

BF550 from Nexperia, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 B input Base terminal of the PNP BJT. Controls collector current via VBE (typ. -750 mV at IC = -1 mA, VCE = -10 V). Emitter-base breakdown VEBO = -4 V (open collector).
2 E passive Emitter terminal of the PNP BJT. Common reference for VBE and VCE. Emitter cut-off current IEBO max -100 nA at VEB = -3 V.
3 C passive Collector terminal of the PNP BJT. VCBO = -40 V (open emitter), VCEO = -40 V (open base), IC (DC) max -25 mA, total power dissipation 250 mW at Tamb <= 25 C.

Key specifications

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

CAD (KiCad official)

  • Symbol: BF550
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Nexperia datasheet (7 pp, sha256 17214ceb4de5cd8d, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF