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MMBT3906T

Public Made by Adom

by adom

Changjing 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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docs Publish 0.1.0 · Ray 25d ago
viewers mmbt3906t: viewers · Ray 25d ago
mmbt3906t-etched.glb mmbt3906t: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
mmbt3906t-etched.step mmbt3906t: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
mmbt3906t-hero.glb mmbt3906t: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
mmbt3906t-hero.overlay.json mmbt3906t: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
mmbt3906t.glb plain STEP: one free product with face colours (generated model was nested; tscircuit read it white) · Ray 17d ago
mmbt3906t.kicad_mod Publish 0.1.0 · Ray 25d ago
mmbt3906t.kicad_sym Publish 0.1.0 · Ray 25d ago
mmbt3906t.lbr Publish 0.1.0 · Ray 25d ago
mmbt3906t.step plain STEP: one free product with face colours (generated model was nested; tscircuit read it white) · Ray 17d ago
package.json mmbt3906t: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
page.json mmbt3906t: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
README.md mmbt3906t: specified limits as data (metadata.characteristics, 30 rows from the datasheet) · Ray 19d ago

MMBT3906T

Changjing · Bipolar (BJT) · SOT-523

MMBT3906T from Changjing, 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 BASE input Base terminal of the PNP transistor; the datasheet gives no pin-specific limit, only device ratings such as VEBO -5.0 V and continuous IC -200 mA.
2 EMITTER passive Emitter terminal of the PNP transistor; the datasheet gives no pin-specific limit, with the emitter-base rating VEBO stated as -5.0 V.
3 COLLECTOR passive Collector terminal of the PNP transistor; the datasheet gives no pin-specific limit, with device ratings of VCBO -40 V, VCEO -40 V and continuous IC -200 mA.

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-523
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 V 1
Collector-Base voltage VCBO -40 V 1
Emitter-Base voltage VEBO -5 V 1
Collector Current -Continuous IC -200 mA 1
Collector Power Dissipation PC 150 mW 1
Operating Temperature TJ 150 ℃ 1
Storage Temperature Tstg -55 150 ℃ 1
Thermal Resistance, Junction to Ambient RθJA 833 ℃/W 1
Collector-base breakdown voltage V(BR)CBO -40 V IC=-10μA,IE=0 1
Collector-emitter breakdown voltage V(BR)CEO -40 V IC=-1mA,IB=0 1
Emitter-base breakdown voltage V(BR)EBO -5 V IE=-10μA,IC=0 1
Collector cut-off current ICBO -0.1 μA VCB=-30V,IE=0 1
Emitter cut-off current IEBO -0.1 μA VEB=-5V,IC=0 1
DC current gain hFE(1) 60 VCE=-1V,IC=-0.1mA 1
DC current gain hFE(2) 80 VCE=-1V,IC=-1mA 1
DC current gain hFE(3) 100 300 VCE=-1V,IC=-10mA 1
DC current gain hFE(5) 30 VCE=-1V,IC=-100mA 1
Collector-emitter saturation voltage VCE(sat)1 -0.25 V IC=-10mA,IB=-1mA 1
Collector-emitter saturation voltage VCE(sat)2 -0.4 V IC=-50mA,IB=-5mA 1
Base-emitter saturation voltage VBE(sat)1 -0.65 -0.85 V IC=-10mA,IB=-1mA 1
Base-emitter saturation voltage VBE(sat)2 -0.95 V IC=-50mA,IB=-5mA 1
Transition frequency fT 250 MHz VCE=-20V,IC=-10mA,f=100MHz 1
Collector output capacitance Cobo 4.5 pF VCB=-5V,IE=0,f=1MHz 1
Input capacitance Ciob 10 pF VEB=-0.5V,IE=0,f=1MHz 1
Noise figure NF 4 dB VCE=-5V,Ic=0.1mA 1
Collector cut-off current (ICEX) ICEX -0.05 μA VCB=-30V,VBE(off)=-3V 1
Delay time td 35 nS 1
Rise time tr 35 nS VCC=-3V, VBE(OFF)=-0.5V IC=-10mA , IB1=-1mA 1
Storage time tS 225 nS 1
Fall time tf 75 nS VCC=-3V, IC=-10mA IB1= IB2=-1mA 1

CAD (KiCad official)

  • Symbol: MMBT3906T
  • 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: mmbt3906t-etched.step / mmbt3906t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmbt3906t.step / mmbt3906t.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (4 pp, sha256 7e7892169a85ff6f, 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