# PSD03C

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

PSD03C from FUXINSEMI, 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 | One terminal of the bi-directional TVS diode that protects one bi-directional I/O line, with 3.3 V working voltage and 450 W peak pulse power per line (tp=8/20µs). |
| 2 | I/O 2 | passive | The other terminal of the bi-directional TVS diode that protects one bi-directional I/O line, with 3.3 V working voltage and 450 W peak pulse power per line (tp=8/20µs). |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `PSD03C`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `psd03c-etched.step` / `psd03c-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `psd03c.step` / `psd03c.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FUXINSEMI datasheet](docs/psd03c-datasheet.pdf) (3 pp, sha256 `a0a17707d3ac4fd7`, retrieved 2026-11-04, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/psd03c-datasheet.pdf)