# TUSD03FBXL

**TECH PUBLIC** · ESD And Surge Protection (TVS/ESD) · SOD-323

TUSD03FBXL from TECH PUBLIC, in a SOD-323. 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 | I/O 1 | passive | Bidirectional ESD protection terminal (Pin 1) with 3.3 V max reverse working voltage and 0.4 pF typical capacitance, protecting to ±30 kV air/contact per IEC 61000-4-2. |
| 2 | I/O 2 | passive | Second bidirectional ESD protection terminal (Pin 2), symmetric with Pin 1, 8 A (8/20 µs) peak pulse current rating. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOD-323 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `TUSD03FBXL`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `tusd03fbxl-etched.step` / `tusd03fbxl-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tusd03fbxl.step` / `tusd03fbxl.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603388629456998400) (4 pp, sha256 `c061768dcd8aa047`, retrieved 2026-10-22, 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/tusd03fbxl-datasheet.pdf)