# WPM3401-3

**WILLSEMI Will Semicon** · MOSFETs · SOT-23-3L

WPM3401-3 from WILLSEMI Will Semicon, 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 P-channel enhancement-mode MOSFET; gate-source voltage is rated ±12 V (absolute maximum). |
| 2 | S | passive | Source terminal of the MOSFET; the body diode forward voltage is -0.75 V typical and -1.5 V maximum at IS = -1.0 A, VGS = 0 V. |
| 3 | D | passive | Drain terminal of the MOSFET; drain-source voltage is -30 V, with continuous drain current of -4.6 A at TA = 25°C (steady state, 1 in² pad). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | WILLSEMI Will Semicon |
| Package | SOT-23-3L |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `WPM3401-3`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `wpm3401-3-etched.step` / `wpm3401-3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wpm3401-3.step` / `wpm3401-3.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [WILLSEMI Will Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588918432959483904) (7 pp, sha256 `dadf6c00e77f3f48`, 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/wpm3401-3-datasheet.pdf)