# TPD3V3F4U6S

**TECH PUBLIC** · ESD And Surge Protection (TVS/ESD) · SOT-363

TPD3V3F4U6S from TECH PUBLIC, in a SOT-363. 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 | ESD-protected I/O line with steering diodes to the VCC and GND rails, rated for 3.3V reverse working voltage and 0.8pF max capacitance to GND. |
| 2 | GND | power_in | Ground pin connected to the anode of the internal TVS zener and the lower steering-diode rail, used as the reference for I/O clamping. |
| 3 | I/O2 | passive | ESD-protected I/O line with steering diodes to the VCC and GND rails, rated for 3.3V reverse working voltage and 0.8pF max capacitance to GND. |
| 4 | I/O3 | passive | ESD-protected I/O line with steering diodes to the VCC and GND rails, rated for 3.3V reverse working voltage and 0.8pF max capacitance to GND. |
| 5 | VCC | power_in | Positive rail pin connected to the upper steering-diode rail and TVS zener cathode, with a clamping voltage of 12V typ at Ipp=8A (VCC pin to ground). |
| 6 | I/O4 | passive | ESD-protected I/O line with steering diodes to the VCC and GND rails, rated for 3.3V reverse working voltage and 0.8pF max capacitance to GND. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-363 |
| Category | Circuit Protection |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `TPD3V3F4U6S`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files: `tpd3v3f4u6s-etched.step` / `tpd3v3f4u6s-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpd3v3f4u6s.step` / `tpd3v3f4u6s.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/tpd3v3f4u6s-datasheet.pdf) (4 pp, sha256 `5edaf860f3ce2afd`, retrieved 2026-10-17, 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/tpd3v3f4u6s-datasheet.pdf)