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SMMBT3904LT3G

Public Made by Adom

by adom

onsemi Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SMMBT3904LT3G

onsemi · Bipolar (BJT) · SOT-23

SMMBT3904LT3G 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 general-purpose transistor; the maximum emitter-base voltage rating VEBO is 6.0 Vdc.
2 EMITTER passive Emitter terminal of the NPN general-purpose transistor; the maximum emitter-base voltage rating VEBO is 6.0 Vdc.
3 COLLECTOR passive Collector terminal of the NPN general-purpose transistor; the maximum collector-emitter voltage VCEO is 40 Vdc and continuous collector current IC is 200 mAdc.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOT-23
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-Emitter Voltage VCEO 40 Vdc 2
Collector-Base Voltage VCBO 60 Vdc 2
Emitter-Base Voltage VEBO 6 Vdc 2
Collector Current - Continuous IC 200 mAdc 2
Collector Current - Peak ICM 900 mAdc Note 3: reference SOA curve 2
Total Device Dissipation FR-5 Board PD 225 mW FR-5 board (Note 1) @ TA = 25°C 2
Thermal Resistance, Junction-to-Ambient, FR-5 Board RJA 556 °C/W FR-5 board (Note 1) 2
Total Device Dissipation Alumina Substrate PD 300 mW Alumina substrate (Note 2) @ TA = 25°C 2
Thermal Resistance, Junction-to-Ambient, Alumina Substrate RJA 417 °C/W Alumina substrate (Note 2) 2
Junction and Storage Temperature TJ, Tstg -55 150 °C 2
Collector-Emitter Breakdown Voltage V(BR)CEO 40 Vdc IC = 1.0 mAdc, IB = 0 3
Collector-Base Breakdown Voltage V(BR)CBO 60 Vdc IC = 10 Adc, IE = 0 3
Emitter-Base Breakdown Voltage V(BR)EBO 6 Vdc IE = 10 Adc, IC = 0 3
Base Cutoff Current IBL 50 nAdc VCE = 30 Vdc, VEB = 3.0 Vdc 3
Collector Cutoff Current ICEX 50 nAdc VCE = 30 Vdc, VEB = 3.0 Vdc 3
DC Current Gain HFE 40 - IC = 0.1 mAdc, VCE = 1.0 Vdc 3
DC Current Gain HFE 70 - IC = 1.0 mAdc, VCE = 1.0 Vdc 3
DC Current Gain HFE 100 300 - IC = 10 mAdc, VCE = 1.0 Vdc 3
DC Current Gain HFE 60 - IC = 50 mAdc, VCE = 1.0 Vdc 3
DC Current Gain HFE 30 - IC = 100 mAdc, VCE = 1.0 Vdc 3
Collector-Emitter Saturation Voltage VCE(sat) 0.2 Vdc IC = 10 mAdc, IB = 1.0 mAdc 3
Collector-Emitter Saturation Voltage VCE(sat) 0.3 Vdc IC = 50 mAdc, IB = 5.0 mAdc 3
Base-Emitter Saturation Voltage VBE(sat) 0.65 0.85 Vdc IC = 10 mAdc, IB = 1.0 mAdc 3
Base-Emitter Saturation Voltage VBE(sat) 0.95 Vdc IC = 50 mAdc, IB = 5.0 mAdc 3
Current-Gain Bandwidth Product fT 300 MHz IC = 10 mAdc, VCE = 20 Vdc, f = 100 MHz 3
Output Capacitance Cobo 4 pF VCB = 5.0 Vdc, IE = 0, f = 1.0 MHz 3
Input Capacitance Cibo 8 pF VEB = 0.5 Vdc, IC = 0, f = 1.0 MHz 3
Input Impedance hie 1 10 k VCE = 10 Vdc, IC = 1.0 mAdc, f = 1.0 kHz 3
Voltage Feedback Ratio hre 0.5 8 X 10-4 VCE = 10 Vdc, IC = 1.0 mAdc, f = 1.0 kHz 3
Small-Signal Current Gain hfe 100 400 - VCE = 10 Vdc, IC = 1.0 mAdc, f = 1.0 kHz 3
Output Admittance hoe 1 40 mhos VCE = 10 Vdc, IC = 1.0 mAdc, f = 1.0 kHz 3
Noise Figure NF 5 dB VCE = 5.0 Vdc, IC = 100 Adc, RS = 1.0 k ohms, f = 1.0 kHz 3
Delay Time td 35 ns VCC = 3.0 Vdc, VBE = -0.5 Vdc, IC = 10 mAdc, IB1 = 1.0 mAdc 3
Rise Time tr 35 ns 3
Storage Time ts 200 ns VCC = 3.0 Vdc, IC = 10 mAdc, IB1 = IB2 = 1.0 mAdc 3
Fall Time tf 50 ns 3

CAD (KiCad official)

  • Symbol: SMMBT3904LT3G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: smmbt3904lt3g-etched.step / smmbt3904lt3g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smmbt3904lt3g.step / smmbt3904lt3g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (9 pp, sha256 0ab2b165d41d9a01, retrieved 2026-10-15, 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