# PESD0402MS05-MS

**MSKSEMI** · ESD And Surge Protection (TVS/ESD) · 0402

PESD0402MS05-MS from MSKSEMI, in a 0402. 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 | IO1 | passive | One terminal of the bi-directional single-line ESD protection diode, rated for 5 V continuous operating voltage and 8 kV contact / 15 kV air IEC 61000-4-2 discharge. |
| 2 | IO2 | passive | Second terminal of the bi-directional single-line ESD protection diode, interchangeable with the other terminal, with 0.05 pF typical capacitance. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | 0402 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `PESD0402MS05-MS`
- Footprint: `Resistor_SMD:R_0402_1005Metric`
- 3D model: 0402 (KiCad packages3D, STEP)
- 3D model files: `pesd0402ms05-ms-etched.step` / `pesd0402ms05-ms-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pesd0402ms05-ms.step` / `pesd0402ms05-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/8590907328566665216) (6 pp, sha256 `33ed6b0851a73014`, retrieved 2026-09-29, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/pesd0402ms05-ms-datasheet.pdf)