component

KMBT3904

Public Made by Adom

by adom

KEXIN 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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docs Publish 0.1.0 · Ray 20d ago
viewers kmbt3904: viewers · Ray 20d ago
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kmbt3904-etched.step kmbt3904: factory component page (tier=lcsc) · Ray 20d ago
kmbt3904-hero.glb kmbt3904: hero GLB from the etched model (keeps the MPN mark) · Ray 20d ago
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KMBT3904

KEXIN · Bipolar (BJT) · SOT-23

KMBT3904 from KEXIN, 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 NPN transistor; the datasheet gives VEBO 6 V (emitter-base) and VBE(sat) 0.95 V at IC=50 mA, IB=5 mA.
2 Emitter passive Emitter terminal of the NPN transistor; the datasheet rates emitter-base voltage VEBO at 6 V and continuous collector current IC at 0.2 A.
3 Collector passive Collector terminal of the NPN transistor; the datasheet rates VCBO at 60 V, VCEO at 40 V, IC continuous at 0.2 A and collector power dissipation PC at 0.2 W.

Key specifications

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

CAD (KiCad official)

  • Symbol: KMBT3904
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: kmbt3904-etched.step / kmbt3904-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); kmbt3904.step / kmbt3904.glb are the bare package body.

Provenance

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

  • Datasheet: KEXIN datasheet (2 pp, sha256 9fc9ec86806f25db, 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