# PESD0603MS03-MS

**MSKSEMI** · ESD And Surge Protection (TVS/ESD) · 0603

PESD0603MS03-MS from MSKSEMI, in a 0603. 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 | A1 | passive | Bidirectional ESD protection terminal, one side of the single-line TVS (continuous operating voltage 3.3 V max, 0.05 pF typ. capacitance); the device is symmetric so terminals are interchangeable. |
| 2 | A2 | passive | Bidirectional ESD protection terminal, other side of the single-line TVS (continuous operating voltage 3.3 V max, IEC 61000-4-2 rated 8 kV contact / 15 kV air); the device is symmetric so terminals are interchangeable. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | 0603 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `PESD0603MS03-MS`
- Footprint: `Diode_SMD:D_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `pesd0603ms03-ms-etched.step` / `pesd0603ms03-ms-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pesd0603ms03-ms.step` / `pesd0603ms03-ms.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MSKSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603011164452503552) (6 pp, sha256 `ac933743ea620737`, 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/pesd0603ms03-ms-datasheet.pdf)