# ESDA25W5

**TECH PUBLIC** · ESD And Surge Protection (TVS/ESD) · SOT-353

ESDA25W5 from TECH PUBLIC, in a SOT-353. 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 | TVS protected I/O line 1, clamped to pin 2 (GND) with 24V max reverse working voltage and ±15kV air / ±8kV contact ESD protection. |
| 2 | GND | power_in | Common ground/cathode node of the 4-line TVS array that all I/O diodes reference. |
| 3 | IO2 | passive | TVS protected I/O line 2, clamped to pin 2 (GND) with 24V max reverse working voltage and ±15kV air / ±8kV contact ESD protection. |
| 4 | IO3 | passive | TVS protected I/O line 3, clamped to pin 2 (GND) with 24V max reverse working voltage and ±15kV air / ±8kV contact ESD protection. |
| 5 | IO4 | passive | TVS protected I/O line 4, clamped to pin 2 (GND) with 24V max reverse working voltage and ±15kV air / ±8kV contact ESD protection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-353 |
| Category | Circuit Protection |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `ESDA25W5`
- Footprint: `Package_TO_SOT_SMD:SOT-353_SC-70-5`
- 3D model: SOT-353 (KiCad packages3D, STEP)
- 3D model files: `esda25w5-etched.step` / `esda25w5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esda25w5.step` / `esda25w5.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/8590207948656828416) (4 pp, sha256 `1c2a9d6183266289`, retrieved 2026-10-09, 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/esda25w5-datasheet.pdf)