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MMBT3904T-7-F

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Diodes Incorporated Bipolar (BJT), SOT-523. 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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mmbt3904t-7-f-etched.step mmbt3904t-7-f: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
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mmbt3904t-7-f.glb plain STEP: one free product with face colours (generated model was nested; tscircuit read it white) · Ray 17d ago
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mmbt3904t-7-f.step plain STEP: one free product with face colours (generated model was nested; tscircuit read it white) · Ray 17d ago
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README.md Publish 0.1.0 · Ray 25d ago

MMBT3904T-7-F

Diodes Incorporated · Bipolar (BJT) · SOT-523

MMBT3904T-7-F from Diodes Incorporated, in a SOT-523. 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 input Base terminal; controls collector current; VBE(SAT) 0.65-0.95 V at IC = 10-50 mA.
2 E passive Emitter terminal; VEBO absolute maximum 6 V (emitter-base reverse voltage).
3 C passive Collector terminal; VCEO max 40 V, VCBO max 60 V, IC max 200 mA, VCE(SAT) max 0.2-0.3 V at IC = 10-50 mA.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-523
Category Transistors/Thyristors
Pins 3

CAD (KiCad official)

  • Symbol: MMBT3904T-7-F
  • Footprint: Package_TO_SOT_SMD:SOT-523
  • 3D model: SOT-523, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.8 mm nominal SOT-523 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
  • 3D model files: mmbt3904t-7-f-etched.step / mmbt3904t-7-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmbt3904t-7-f.step / mmbt3904t-7-f.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (6 pp, sha256 2cf3ed813df81c6e, retrieved 2026-10-09, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-sonnet-4-6 (text+vision), consensus claude-opus-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