component

M28S

Public Made by Adom

by adom

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

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M28S

ALJ · Bipolar (BJT) · SOT-23

M28S from ALJ, 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 transistor; the datasheet rates VEBO at 6 V and gives the emitter cut-off current IEBO as 100 nA maximum at VEB = 5 V.
2 Emitter passive Emitter terminal of the NPN transistor; the maximum ratings specify VEBO of 6 V and the absolute maximum collector current IC of 1 A flows through this path.
3 Collector passive Collector terminal of the NPN transistor; the maximum ratings specify VCBO of 40 V, VCEO of 20 V, IC of 1 A and collector power dissipation PC of 200 mW.

Key specifications

Parameter Value
Manufacturer ALJ
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 Voltage VCBO 40 V 1
Collector Emitter Voltage VCEO 20 V 1
Emitter Base Voltage VEBO 6 V 1
Collector Current IC 1 A 1
Collector Power Dissipation PC 200 mW 1
Junction Temperature Tj 150 °C 1
Storage Temperature Tstg -55 150 °C 1
Thermal Resistance from Junction to Ambient RθJA 625 °C/W 1
Collector-base breakdown voltage V(BR)CBO 40 V IC = 100µA, IE = 0 1
Collector-emitter breakdown voltage V(BR)CEO 20 V IC = 1mA, IB = 0 1
Emitter-base breakdown voltage V(BR)EBO 6 V IE = 100µA, IC = 0 1
Collector cut-off current ICBO 100 nA VCB = 35V, IE = 0 1
Collector cut-off current ICEO 5 μA VCE = 20V, IB = 0 1
Emitter cut-off current IEBO 100 nA VEB = 5V, IC = 0 1
DC current gain hFE(1) 300 1000 VCE = 5V, IC = 1mA 1
DC current gain hFE(2) 290 VCE = 1V, IC = 1mA 1
DC current gain hFE(3) 300 VCE = 1V, IC = 100mA 1
Collector-emitter saturation voltage VCE(sat) 0.55 V IC = 600mA, IB = 20mA 1
Transition frequency fT 100 MHz VCE = 10V, IC = 50mA, f = 1MHz 1
Collector output capacitance Cob 9 pF VCB = 10V, IE = 0, f = 1MHz 1

CAD (KiCad official)

  • Symbol: M28S
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: m28s-etched.step / m28s-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); m28s.step / m28s.glb are the bare package body.

Provenance

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

  • Datasheet: ALJ datasheet (2 pp, sha256 fd8491dea5647361, 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