# HX3403

**HX hengjiaxing** · MOSFETs · SOT-23

HX3403 from HX hengjiaxing, 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 | G | input | Gate; drive with VGS limited to ±12 V, threshold VGS(th) -0.5 V min to -1.5 V max, usable at gate voltages as low as 2.5 V. |
| 2 | S | passive | Source of the P-channel MOSFET; the body diode forward current is limited to -1.25 A. |
| 3 | D | passive | Drain; VDS maximum -30 V, continuous drain current -2.6 A and pulsed drain current -12 A. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `HX3403`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `hx3403-etched.step` / `hx3403-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hx3403.step` / `hx3403.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HX hengjiaxing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590226279301099520) (3 pp, sha256 `8885c9b2fc991eb0`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/hx3403-datasheet.pdf)