# ESDA25SC6Y

**STMicroelectronics** · ESD And Surge Protection (TVS/ESD) · SOT-23-6L

ESDA25SC6Y from STMicroelectronics, in a SOT-23-6L. 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 (one of four unidirectional Transil channels); 25 V min breakdown, 60 pF typ line capacitance. |
| 2 | GND | power_in | Common center node of the four Transil channels, shown connected internally to pin 5 in the pin configuration figure. |
| 3 | I/O3 | passive | Protected line 3 (one of four unidirectional Transil channels); 25 V min breakdown, 60 pF typ line capacitance. |
| 4 | I/O4 | passive | Protected line 4 (one of four unidirectional Transil channels); 25 V min breakdown, 60 pF typ line capacitance. |
| 5 | GND | power_in | Common center node of the four Transil channels, shown connected internally to pin 2 in the pin configuration figure. |
| 6 | I/O2 | passive | Protected line 2 (one of four unidirectional Transil channels); 25 V min breakdown, 60 pF typ line capacitance. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23-6L |
| Category | Circuit Protection |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `ESDA25SC6Y`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6L (KiCad packages3D, STEP)
- 3D model files: `esda25sc6y-etched.step` / `esda25sc6y-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esda25sc6y.step` / `esda25sc6y.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588939710245056512) (15 pp, sha256 `676b300b76147436`, retrieved 2026-10-08, 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/esda25sc6y-datasheet.pdf)