# AO3422MI-MS

**MSKSEMI** · MOSFETs · SOT-23-3L

AO3422MI-MS from MSKSEMI, 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 of the N-channel MOSFET; the datasheet gives a gate-source voltage limit of ±20 V and a gate threshold VGS(th) of 1.2 V to 2.5 V. |
| 2 | D | passive | Drain of the N-channel MOSFET; the datasheet rates the drain-source voltage at 60 V and the continuous drain current at 4.5 A. |
| 3 | S | passive | Source of the N-channel MOSFET; the datasheet gives a continuous source current IS of 17 A and a pulsed source current ISM of 50 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| 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 Breakdown Voltage | BVDSS | 60 |  |  | V | VGS=0V, ID=250uA | 3 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 70 | 80 | mΩ | VGS=10V, ID=5A | 3 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 80 | 100 | mΩ | VGS=4.5V, ID=5A | 3 |
| Gate Threshold Voltage | VGS(th) | 1.2 |  | 2.5 | V | VGS=VDS, ID=250uA | 3 |
| Drain-Source Leakage Current | IDSS |  |  | 1 | uA | VDS=48V, VGS=0V, TJ=25℃ | 3 |
| Drain-Source Leakage Current | IDSS |  |  | 5 | uA | VDS=48V, VGS=0V, TJ=55℃ | 3 |
| Gate-Source Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±20V, VDS=0V | 3 |
| Continuous Source Current | IS |  |  | 17 | A | VG=VD=0V, Force Current | 3 |
| Pulsed Source Current | ISM |  |  | 50 | A |  | 3 |
| Diode Forward Voltage | VSD |  |  | 1.2 | V | VGS=0V, IS=1A, TJ=25℃ | 3 |
| Drain-Source Voltage | VDS |  |  | 60 | V |  | 2 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 2 |
| Drain Current-Continuous | ID |  |  | 4.5 | A |  | 2 |
| Drain Current-Pulsed | IDM |  |  | 15 | A | Note 1 | 2 |
| Maximum Power Dissipation | PD |  |  | 8 | W |  | 2 |
| Operating Junction and Storage Temperature Range | TJ,TSTG | -55 |  | 150 | ℃ |  | 2 |
| Thermal Resistance, Junction-to-Ambient | RθJA |  |  | 89 | ℃/W | Note 2 | 2 |

## CAD (KiCad official)

- Symbol: `AO3422MI-MS`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `ao3422mi-ms-etched.step` / `ao3422mi-ms-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ao3422mi-ms.step` / `ao3422mi-ms.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MSKSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590456031039029248) (7 pp, sha256 `3f2f0783d4f42939`, 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](docs/ao3422mi-ms-datasheet.pdf)