# ESDA0504T5

**Leiditech** · ESD And Surge Protection (TVS/ESD) · SOT-553

ESDA0504T5 from Leiditech, in a SOT-553. 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 | Protected line 1 of the TVS array, rated for 5V working voltage (VRWM) and ±15kV air / ±8kV contact ESD per IEC 61000-4-2. |
| 2 | GND | power_in | Common ground node of the TVS array, tied to the centre node joining the diode pairs in the pin configuration drawing. |
| 3 | IO3 | passive | Protected line 3 of the TVS array, rated for 5V working voltage (VRWM) and ±15kV air / ±8kV contact ESD per IEC 61000-4-2. |
| 4 | IO4 | passive | Protected line 4 of the TVS array, rated for 5V working voltage (VRWM) and ±15kV air / ±8kV contact ESD per IEC 61000-4-2. |
| 5 | IO5 | passive | Protected line 5 of the TVS array, rated for 5V working voltage (VRWM) and ±15kV air / ±8kV contact ESD per IEC 61000-4-2. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Leiditech |
| Package | SOT-553 |
| Category | Circuit Protection |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `ESDA0504T5`
- Footprint: `Package_TO_SOT_SMD:SOT-553`
- 3D model: SOT-553 (KiCad packages3D, STEP)
- 3D model files: `esda0504t5-etched.step` / `esda0504t5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esda0504t5.step` / `esda0504t5.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Leiditech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588903975952900096) (3 pp, sha256 `0b814e972e8d07f2`, retrieved 2026-10-22, 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/esda0504t5-datasheet.pdf)