component

AS3423B

Public Made by Adom

by adom

FMS Formosa Microsemi MOSFETs, SOT-23-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttransistors-thyristorsas3423bfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
as3423b / README.md
History Download
Ray Publish 0.1.0 164dd15 17d ago

AS3423B

FMS Formosa Microsemi · MOSFETs · SOT-23-3L

AS3423B from FMS Formosa Microsemi, in a SOT-23-3L. 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 G input Gate; gate-source voltage limited to ±10 V, with threshold VGS(th) of -0.5 V to -1.5 V at ID = -250µA.
2 S passive Source of the P-channel MOSFET, connected to the body diode anode; continuous drain current is -3 A.
3 D passive Drain; drain-source voltage rated -20 V, continuous drain current -3 A, pulsed -10 A.

Key specifications

Parameter Value
Manufacturer FMS Formosa Microsemi
Package SOT-23-3L
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
Drain-Source Voltage VDS -20 V Ta=25℃ unless otherwise noted 2
Gate-Source Voltage VGS -10 10 V Ta=25℃ unless otherwise noted 2
Continuous Drain Current ID -3 A Ta=25℃ unless otherwise noted 2
Pulsed Drain Current IDM -10 A Ta=25℃ unless otherwise noted 2
Power Dissipation PD 1 W Ta=25℃ unless otherwise noted 2
Junction Temperature TJ 150 ℃ Ta=25℃ unless otherwise noted 2
Storage Temperature TSTG -55 150 ℃ Ta=25℃ unless otherwise noted 2
Drain-source breakdown voltage V(BR)DSS -20 V VGS = 0V, ID =-250µA 2
Zero gate voltage drain current IDSS -1 µA VDS =-16V, VGS = 0V 2
Gate-body leakage current IGSS -100 100 nA VGS =±10V, VDS = 0V 2
Gate threshold voltage VGS(th) -0.5 -1.5 V VDS =VGS, ID =-250µA 2
Drain-source on-resistance (VGS=-4.5V) RDS(on) 70 90 mΩ VGS =-4.5V, ID =-3A 2
Drain-source on-resistance (VGS=-2.5V) RDS(on) 90 110 mΩ VGS =-2.5V, ID =-2A 2
Diode forward voltage VDS -1.5 V VGS =0V, IS=-0.75A 2

CAD (KiCad official)

  • Symbol: AS3423B
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3L (KiCad packages3D, STEP)
  • 3D model files: as3423b-etched.step / as3423b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); as3423b.step / as3423b.glb are the bare package body.

Provenance

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

  • Datasheet: FMS Formosa Microsemi datasheet (3 pp, sha256 f17e41fed972144a, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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