component
AS3423B
Public Made by Adomby adom
FMS Formosa Microsemi MOSFETs, SOT-23-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownAS3423B
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);as3423b.step/as3423b.glbare 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, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).