component

2N3904-338

Public Made by Adom

by adom

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

componenttransistors-thyristors2n3904-338factory-2.0.0extractor-text

Verified 2N3904-338

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier lcsc, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: 2N3904-338 · TO-92 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 2-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: TO-92_Inline
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-p6kdlyxh/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ 2n3904-338.kicad_sym✓ 2n3904-338.kicad_mod✓ 2n3904-338.step
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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 2d ago
viewers 2n3904-338: viewers · Ray 2d ago
2n3904-338-etched.glb Publish 0.1.0 · Ray 2d ago
2n3904-338-etched.step 2n3904-338: factory component page (tier=lcsc) · Ray 2d ago
2n3904-338-hero.glb 2n3904-338: hero GLB from the etched model (keeps the MPN mark) · Ray 2d ago
2n3904-338-hero.overlay.json Publish 0.1.0 · Ray 2d ago
2n3904-338.glb Publish 0.1.0 · Ray 2d ago
2n3904-338.kicad_mod Publish 0.1.0 · Ray 2d ago
2n3904-338.kicad_sym Publish 0.1.0 · Ray 2d ago
2n3904-338.lbr Publish 0.1.0 · Ray 2d ago
2n3904-338.step Publish 0.1.0 · Ray 2d ago
package.json Publish 0.1.0 · Ray 2d ago
page.json Set visibility: public · Ray 2d ago
README.md Publish 0.1.0 · Ray 2d ago
verification.json Verified: Published by the parts factory: tier lcsc, 3 pins · Ray 2d ago

2N3904-338

ALJ · Bipolar (BJT) · TO-92

2N3904-338 from ALJ, 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 EMITTER passive Emitter terminal of the NPN transistor; the datasheet rates the emitter-base voltage VEBO at 6 V.
2 BASE passive Base terminal of the NPN transistor; the datasheet rates the base current IB at 50 mA.
3 COLLECTOR passive Collector terminal of the NPN transistor; the datasheet rates the collector current IC at 200 mA and the collector-emitter voltage VCEO at 40 V.

Key specifications

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Collector-base breakdown voltage V(BR)CBO 60 V IC=10uA, IE=0 1
Collector-emitter breakdown voltage V(BR)CEO 40 V IC=1mA, IB=0 1
Emitter-base breakdown voltage V(BR)EBO 6 V IE=10μA, IC=0 1
Collector cut-off current ICBO 0.1 μA VCB=60V, IE=0 1
Emitter cut-off current ICEO 0.1 μA VCE=40V, IE=0 1
DC current gain hFE(1) 40 VCE=1V, IC=0.1mA 1
DC current gain hFE(2) 70 VCE=1V, IC=1mA 1
DC current gain hFE(3) 100 400 VCE=1V, IC=10mA 1
DC current gain hFE(4) 60 VCE=1V, IC=50mA 1
DC current gain hFE(5) 30 VCE=1V, IC=100mA 1
Collector-emitter saturation voltage VCE(sat) 0.2 V IC=10mA, IB=1mA 1
Collector-emitter saturation voltage VCE(sat) 0.3 V IC=50mA, IB=5mA 1
Base-emitter saturation voltage VBE(sat) 0.65 0.85 V IC=10mA, IB=1mA 1
Base-emitter saturation voltage VBE(sat) 0.95 V IC=50mA, IB=5mA 1
Transition frequency fT 300 MHz VCE=20V, IC=10mA, f=100MHZ 1
Delay time td 35 ns VCC=3V, VBE=0.5V, IC=10mA, IB1=1mA 1
Rise time tr 35 ns 1
Storage time ts 200 ns VCC=3V, IC=10mA, IB1=IB2=1mA 1
Fall time tf 50 ns 1
Collector-base voltage VCBO 60 V 1
Collector-emitter voltage VCEO 40 V 1
Emitter-base voltage VEBO 6 V 1
Collector current IC 200 mA 1
Base current IB 50 mA 1
Collector power dissipation PC 625 mW Ta=25 1
Collector power dissipation PC 1.5 W Tc=25 1
Junction temperature Tj 150 1
Storage temperature range Tstg -55 150 1

CAD (KiCad official)

  • Symbol: 2N3904-338
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: 2n3904-338-etched.step / 2n3904-338-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 2n3904-338.step / 2n3904-338.glb are the bare package body.

Provenance

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

  • Datasheet: ALJ datasheet (2 pp, sha256 11a3bd074c11f1a6, retrieved 2026-11-05, 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