component

SMMBT3904LT1G

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-thyristorssmmbt3904lt1gfactory-2.0.0extractor-text
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smmbt3904lt1g-etched.glb smmbt3904lt1g: factory component page (tier=lcsc) · Ray 20d ago
smmbt3904lt1g-etched.step smmbt3904lt1g: factory component page (tier=lcsc) · Ray 20d ago
smmbt3904lt1g-hero.glb smmbt3904lt1g: hero GLB from the etched model (keeps the MPN mark) · Ray 20d ago
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SMMBT3904LT1G

onsemi · Bipolar (BJT) · SOT-23

SMMBT3904LT1G 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 NPN transistor; the datasheet gives no separate base current rating, and the related limit is the emitter-base voltage VEBO of 6.0 Vdc maximum.
2 EMITTER passive Emitter terminal of the NPN transistor; the emitter-base voltage is limited to VEBO 6.0 Vdc and the device is rated for 200 mA continuous collector current.
3 COLLECTOR passive Collector terminal of the NPN transistor; rated for VCEO 40 Vdc, VCBO 60 Vdc, 200 mA continuous collector current and 900 mA peak collector current (Note 3).

Key specifications

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

CAD (KiCad official)

  • Symbol: SMMBT3904LT1G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: smmbt3904lt1g-etched.step / smmbt3904lt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smmbt3904lt1g.step / smmbt3904lt1g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (7 pp, sha256 8d63fa245f101a60, 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