# AO3401PSA

**DOWO** · MOSFETs · SOT-23

AO3401PSA from DOWO, 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 of the P-channel enhancement-mode MOSFET; gate-source voltage is rated ±12 V. |
| 2 | Source | passive | Source of the P-channel MOSFET; the device is rated for a drain-source voltage of -30 V (VDS 30 V) and continuous drain current of 4.1 A. |
| 3 | Drain | passive | Drain of the P-channel MOSFET; rated -VDS 30 V, continuous drain current -ID 4.1 A, pulsed -IDM 20 A, and maximum power dissipation 1.2 W. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | DOWO |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `AO3401PSA`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ao3401psa-etched.step` / `ao3401psa-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ao3401psa.step` / `ao3401psa.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [DOWO datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603183862042546176) (7 pp, sha256 `5173ff6ceaa48dcf`, retrieved 2026-10-09, 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/ao3401psa-datasheet.pdf)