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SMMBT3906LT1G

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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SMMBT3906LT1G

onsemi · Bipolar (BJT) · SOT-23

SMMBT3906LT1G 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 PNP general-purpose transistor; the device is rated for emitter-base voltage VEBO of -5.0 Vdc.
2 EMITTER passive Emitter terminal of the PNP general-purpose transistor; the device is rated for collector-emitter voltage VCEO of -40 Vdc and continuous collector current IC of -200 mAdc.
3 COLLECTOR passive Collector terminal of the PNP general-purpose transistor; the device is rated for collector-base voltage VCBO of -40 Vdc and peak collector current ICM of -800 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 Breakdown Voltage V(BR)CEO -40 Vdc IC = -1.0 mAdc, IB = 0 2
Collector-Base Breakdown Voltage V(BR)CBO -40 Vdc IC = -10 Adc, IE = 0 2
Emitter-Base Breakdown Voltage V(BR)EBO -5 Vdc IE = -10 Adc, IC = 0 2
Base Cutoff Current IBL -50 nAdc VCE = -30 Vdc, VEB = -3.0 Vdc 2
Collector Cutoff Current ICEX -50 nAdc VCE = -30 Vdc, VEB = -3.0 Vdc 2
DC Current Gain HFE 60 - IC = -0.1 mAdc, VCE = -1.0 Vdc 2
DC Current Gain HFE 80 - IC = -1.0 mAdc, VCE = -1.0 Vdc 2
DC Current Gain HFE 100 300 - IC = -10 mAdc, VCE = -1.0 Vdc 2
DC Current Gain HFE 30 - IC = -100 mAdc, VCE = -1.0 Vdc 2
Collector-Emitter Saturation Voltage VCE(sat) -0.25 Vdc IC = -10 mAdc, IB = -1.0 mAdc 2
Collector-Emitter Saturation Voltage VCE(sat) -0.4 Vdc IC = -50 mAdc, IB = -5.0 mAdc 2
Base-Emitter Saturation Voltage VBE(sat) -0.65 -0.85 Vdc IC = -10 mAdc, IB = -1.0 mAdc 2
Base-Emitter Saturation Voltage VBE(sat) -0.95 Vdc IC = -50 mAdc, IB = -5.0 mAdc 2
Current-Gain - Bandwidth Product fT 250 MHz IC = -10 mAdc, VCE = -20 Vdc, f = 100 MHz 2
Output Capacitance Cobo 4.5 pF VCB = -5.0 Vdc, IE = 0, f = 1.0 MHz 2
Input Capacitance Cibo 10 pF VEB = -0.5 Vdc, IC = 0, f = 1.0 MHz 2
Input Impedance hie 2 12 k IC = -1.0 mAdc, VCE = -10 Vdc, f = 1.0 kHz 2
Voltage Feedback Ratio hre 0.1 10 X 10-4 IC = -1.0 mAdc, VCE = -10 Vdc, f = 1.0 kHz 2
Small-Signal Current Gain hfe 100 400 - IC = -1.0 mAdc, VCE = -10 Vdc, f = 1.0 kHz 2
Output Admittance hoe 3 60 mhos IC = -1.0 mAdc, VCE = -10 Vdc, f = 1.0 kHz 2
Noise Figure NF 4 dB IC = -100 Adc, VCE = -5.0 Vdc, RS = 1.0 k, f = 1.0 kHz 2
Delay Time td 35 ns VCC = -3.0 Vdc, VBE = 0.5 Vdc, IC = -10 mAdc, IB1 = -1.0 mAdc 2
Rise Time tr 35 ns 2
Storage Time ts 225 ns VCC = -3.0 Vdc, IC = -10 mAdc, IB1 = IB2 = -1.0 mAdc 2
Fall Time tf 75 ns 2
Collector Current - Continuous IC -200 mAdc 1
Collector Current - Peak ICM -800 mAdc Note 3 (reference SOA curve) 1
Collector-Emitter Voltage VCEO -40 Vdc 1
Collector-Base Voltage VCBO -40 Vdc 1
Emitter-Base Voltage VEBO -5 Vdc 1
Junction and Storage Temperature TJ, Tstg -65 150 °C 1
Total Device Dissipation PD 225 mW FR-5 Board (Note 1) @ TA = 25°C 1
Total Device Dissipation PD 300 mW Alumina Substrate (Note 2) @ TA = 25°C 1
Thermal Resistance, Junction-to-Ambient RθJA 556 °C/W FR-5 Board (Note 1) 1
Thermal Resistance, Junction-to-Ambient RθJA 417 °C/W Alumina Substrate (Note 2) 1

CAD (KiCad official)

  • Symbol: SMMBT3906LT1G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: smmbt3906lt1g-etched.step / smmbt3906lt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smmbt3906lt1g.step / smmbt3906lt1g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (8 pp, sha256 d6ed93dca61d330e, retrieved 2026-10-18, 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