# AO3422A

**UMW** · MOSFETs · SOT-23

AO3422A from UMW, 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 | GATE | input | Gate terminal of the N-channel MOSFET; gate-source voltage is rated ±12 V, and the device is specified for gate drive from 2.5 V to 12 V. |
| 2 | SOURCE | passive | Source terminal of the N-channel MOSFET; continuous source-drain diode current is rated at IS = 0.85 A. |
| 3 | DRAIN | passive | Drain terminal of the N-channel MOSFET; drain-source voltage is rated at 60 V, with continuous drain current ID = 2.1 A and pulsed drain current IDM = 10 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| 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 |
|---|---|---|---|---|---|---|---|
| Drain-source breakdown voltage | V(BR)DSS | 60 |  |  | V | VGS=0V, ID=250µA | 2 |
| Gate-source threshold voltage | VGS(th) | 1 |  | 2.5 | V | VDS=VGS, ID=250µA | 2 |
| Gate-source leakage | IGSS | -100 |  | 100 | nA | VDS=0V, VGS=±20V | 2 |
| Zero gate voltage drain current | IDSS |  |  | 1 | µA | VDS=60V, VGS=0V | 2 |
| Drain-source on-state resistance | RDS(ON) |  |  | 80 | mΩ | VGS=10V, ID=2.1A | 2 |
| Drain-source on-state resistance | RDS(ON) |  |  | 89 | mΩ | VGS=4.5V, ID=2A | 2 |
| Diode forward voltage | VSD |  | 0.8 | 1.3 | V | IS=1.5A, VGS=0V | 2 |
| Drain-source voltage | VDS |  |  | 60 | V | TA=25°C | 1 |
| Gate-source voltage | VGS | -12 |  | 12 | V | TA=25°C | 1 |
| Continuous drain current | ID |  |  | 2.1 | A | TA=25°C | 1 |
| Pulsed drain current | IDM |  |  | 10 | A | TA=25°C | 1 |
| Continuous source-drain current (diode conduction) | IS |  |  | 0.85 | A | TA=25°C | 1 |
| Power dissipation | PD |  |  | 1.25 | W | TA=25°C | 1 |
| Thermal resistance from junction to ambient | RθJA |  |  | 125 | °C/W | t≤5s | 1 |
| Operating junction temperature | TJ |  |  | 150 | °C |  | 1 |
| Storage temperature | TSTG | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `AO3422A`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ao3422a-etched.step` / `ao3422a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ao3422a.step` / `ao3422a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755874398903914496) (7 pp, sha256 `9d752832393de6e1`, retrieved 2026-10-19, 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/ao3422a-datasheet.pdf)