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MMBTA28

Public Made by Adom

by adom

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

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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MMBTA28

YONGYUTAI · Bipolar (BJT) · SOT-23

MMBTA28 from YONGYUTAI, 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 passive Base terminal of the NPN transistor; the datasheet rates emitter-base voltage VEBO at 12 V maximum and specifies V(BR)EBO of 12 V minimum at IE=10 µA.
2 EMITTER passive Emitter terminal of the NPN transistor; the datasheet rates collector-emitter voltage VCEO at 80 V and emitter-base voltage VEBO at 12 V.
3 COLLECTOR passive Collector terminal of the NPN transistor; the datasheet rates collector-base voltage VCBO at 80 V, collector current IC at 500 mA, and collector power dissipation PC at 200 mW.

Key specifications

Parameter Value
Manufacturer YONGYUTAI
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-base breakdown voltage V(BR)CBO 80 V IC= 100μA, IE=0 2
Collector-emitter breakdown voltage V(BR)CEO 80 V IC= 100μA, VBE=0 2
Emitter-base breakdown voltage V(BR)EBO 12 V IE=10μA, IC=0 2
Collector cut-off current ICBO 0.1 μA VCB=60 V , IE=0 2
Collector cut-off current ICEO 0.5 μA VCB=60V ,VBE=0 2
Emitter cut-off current IEBO 0.1 μA VEB= 10V , IC=0 2
DC current gain hFE 10 K VCE=5V, IC= 10mA 2
Collector-emitter saturation voltage VCE(sat) 1.2 V IC=10mA, IB= 0.01mA 2
Base-emitter saturation voltage VBE(sat) 2 V IC=100 mA, VCE=5V 2
Transition frequency fT 125 MHz VCE=5V, IC= 10mA, f=100MHz 2
Collector output capacitance Cob 8 pF VCB=1V, IE=0, f=1MHz 2
Collector-Base Voltage VCBO 80 V 1
Collector-Emitter Voltage VCEO 80 V 1
Emitter-Base Voltage VEBO 12 V 1
Collector Current IC 500 mA 1
Collector Power Dissipation PC 200 mW 1
Thermal Resistance From Junction To Ambient RΘJA 625 ℃/W 1
Junction Temperature Tj 150 ℃ 1
Storage Temperature Tstg -55 150 ℃ 1

CAD (KiCad official)

  • Symbol: MMBTA28
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: mmbta28-etched.step / mmbta28-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmbta28.step / mmbta28.glb are the bare package body.

Provenance

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

  • Datasheet: YONGYUTAI datasheet (4 pp, sha256 548c9fea4f4bf7b5, retrieved 2026-10-17, 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