component

2N3904BU

Public Made by Adom

by adom

onsemi Bipolar (BJT), TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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docs Publish 0.1.0 · Ray 15d ago
viewers 2n3904bu: viewers · Ray 15d ago
2n3904bu-etched.glb 2n3904bu: factory component page (tier=lcsc) · Ray 15d ago
2n3904bu-etched.step 2n3904bu: factory component page (tier=lcsc) · Ray 15d ago
2n3904bu-hero.glb 2n3904bu: hero GLB from the etched model (keeps the MPN mark) · Ray 15d ago
2n3904bu-hero.overlay.json Publish 0.1.0 · Ray 15d ago
2n3904bu.glb Publish 0.1.0 · Ray 15d ago
2n3904bu.kicad_mod Publish 0.1.0 · Ray 15d ago
2n3904bu.kicad_sym Publish 0.1.0 · Ray 15d ago
2n3904bu.lbr Publish 0.1.0 · Ray 15d ago
2n3904bu.step Publish 0.1.0 · Ray 15d ago
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README.md Publish 0.1.0 · Ray 15d ago

2N3904BU

onsemi · Bipolar (BJT) · TO-92

2N3904BU from onsemi, in a TO-92. 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 E passive Emitter of the NPN transistor, rated with an emitter-base voltage (VEBO) of 6.0 V maximum per the absolute maximum ratings.
2 B passive Base of the NPN transistor, which is the control terminal; the datasheet specifies VBE(sat) of 0.65 to 0.85 V at IC = 10 mA, IB = 1.0 mA.
3 C passive Collector of the NPN transistor, rated at 40 V collector-emitter voltage (VCEO) and 200 mA continuous collector current (IC).

Key specifications

Parameter Value
Manufacturer onsemi
Package TO-92
Category Transistors/Thyristors
Pins 3

CAD (KiCad official)

  • Symbol: 2N3904BU
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: 2n3904bu-etched.step / 2n3904bu-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 2n3904bu.step / 2n3904bu.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (13 pp, sha256 9425dc0e7ade58bc, 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