# DO3404BA

**DOINGTER** · MOSFETs · SOT-23-3

DO3404BA from DOINGTER, in a SOT-23-3. 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; controls the channel, with VGS rated ±20 V maximum and threshold VGS(th) 1.2 V min to 2.3 V max at ID=250 µA. |
| 2 | D | passive | Drain; VDS rated 30 V maximum with continuous drain current of 5.8 A at TA=25℃ and pulsed drain current of 21 A. |
| 3 | S | passive | Source; connects to the body diode anode and the return path of the drain current (IS continuous 5.8 A). |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `DO3404BA`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `do3404ba-etched.step` / `do3404ba-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `do3404ba.step` / `do3404ba.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [DOINGTER datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604439289786875904) (7 pp, sha256 `b5e9f9158f5d45aa`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).

[Datasheet PDF](docs/do3404ba-datasheet.pdf)