# ESDA25W

**TECH PUBLIC** · ESD Protection Devices · SOT-323

ESDA25W from TECH PUBLIC, in a SOT-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/O1 | passive | Protected line 1 (diode anode in the schematic symbol), uni-directional TVS channel with 24V max reverse working voltage, 25V min breakdown at 1mA, and 350W peak pulse power (8/20µs). |
| 2 | I/O2 | passive | Protected line 2 (diode anode in the schematic symbol), uni-directional TVS channel with 24V max reverse working voltage, 25V min breakdown at 1mA, and 350W peak pulse power (8/20µs). |
| 3 | COMMON | passive | Common cathode node of the two TVS diodes in the schematic symbol, shared by both protected lines (datasheet does not label its function further). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-323 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `ESDA25W`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `esda25w-etched.step` / `esda25w-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esda25w.step` / `esda25w.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/esda25w-datasheet.pdf) (4 pp, sha256 `eac0e0b348d73353`, retrieved 2026-11-04, 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/esda25w-datasheet.pdf)