# TVS3V3L4U

**TECH PUBLIC** · ESD And Surge Protection (TVS/ESD) · SOT-23-6

TVS3V3L4U from TECH PUBLIC, in a SOT-23-6. 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 | ESD/surge protected I/O line (steering-diode channel to GND), 3.3V working voltage, 2 pF typ (3 pF max) to GND. |
| 2 | GND | power_in | Ground; common return for all protection diodes, tie to GND for 4-line uni-directional use, or leave n.c. for 2-line bi-directional use per the applications note. |
| 3 | IO2 | passive | ESD/surge protected I/O line (steering-diode channel to GND), 3.3V working voltage, 2 pF typ (3 pF max) to GND. |
| 4 | IO3 | passive | ESD/surge protected I/O line (steering-diode channel to GND), 3.3V working voltage, 2 pF typ (3 pF max) to GND. |
| 5 | NC | unconnected | Not connected internally (n.c.) per the pin configuration diagram. |
| 6 | IO4 | passive | ESD/surge protected I/O line (steering-diode channel to GND), 3.3V working voltage, 2 pF typ (3 pF max) to GND. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23-6 |
| Category | Circuit Protection |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `TVS3V3L4U`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `tvs3v3l4u-etched.step` / `tvs3v3l4u-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tvs3v3l4u.step` / `tvs3v3l4u.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/8603383972886171648) (4 pp, sha256 `e92897bfae4d9b7b`, 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/tvs3v3l4u-datasheet.pdf)